On topographic maps, the lines connect points of equal elevation. Name: _____ Date: _____ ENV-131 Oceanography Bathymetric Charts Objectives To construct bathymetry maps using contour lines from an array of depth soundings Calculate depth using echo sounder date Prepare 2D bathymetric profiles and calculate vertical exaggeration Materials Pencil, calculator, data sheets Definitions Isobath – a line of equal depth on a bathymetric map or chart. 0000001135 00000 n
They are designed to present an accurate, measurable description and visual presentation of the submerged terrain. Their primary purpose is to provide detailed depth contours of ocean topography as well as provide the size, shape and distribution of underwater features. Subscripts, such as 52, show depths in fathoms and feet (5 fathoms and 2 feet) or decimal meters (5.2 meters). The Synthetic Bathymetric Profiling System (SYNBAPS) consists of 10 FORTRAN IV computer programs, a random-access storage device, and an initial bathymetric data base of over 3 million data points. Found inside – Page 15As now published , bathymetric charts show depth curves , with areas ... The clock times of such occurrences are read on the time scale made by the clock . Reading Topographic Maps Interpreting the colored lines, areas, and other symbols is the fi rst step in using topographic maps. The deepest point is 4,000 meters below sea level, and the shallowest spot is about 1,400 meters down. Found inside – Page iThis volume provides an overview of the geological, geomorphological, climatic and sea-level history of the European continental shelf as a whole, as well as a series of detailed regional reviews for each of the major sea basins. Seabed 2030 is a collaborative project between the Nippon Foundation and GEBCO. We have made available a pre-release version of the GEBCO_2021 Grid. Go to the Chart and select the appropriate Chart Source in Chart Options. Contour lines connect points of equal depths; usually with smoothly curving lines. They are collecting bathymetric, or depth, information in order to create maps of the bottom of the Bay. Bathymetric map, chart that depicts the submerged topography and physiographic features of ocean and sea bottoms. Dive It. 0000003120 00000 n
Briefly describe the structure shown on the image. Scientists studying the seafloor often use bathymetric maps like the one below. CMOR Mapping’s game-changing, high-resolution bathymetric imagery for Simrad, Lowrance, Raymarine, and Furuno chartplotters and Mercury VesselView displays brings the ocean floor into an entirely new level of focus for anglers and divers. The NOAA provides a guide that explains the basic elements and symbols used on charts. 53 0 obj
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The list of essential plotting tools is short. Whenever possible, use the official, full scale NOAA nautical chart for navigation. When the color changes, so does the depth. 0000001156 00000 n
12042-12G - NORTH PACIFIC OCEAN. readGEBCO.bathy reads a 30 arcseconds or 1 arcminute bathymetry file downloaded from the GEBCO (General Bathymetric Chart of the Oceans) Electronic Navigational Charts (ENC) are vector data sets that support all types of marine navigation. 1306N-19 - SANTA ROSA ISLANDS, S.W. Check for great fishing spots with our high resolution bathymetry. Sample bottom hardness map from the same BioBase survey. Bathymetric maps. 53 0 obj
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Detailed multipurpose maps of NOS bathymetry and US Geological Survey (USGS) land topography. Bathymetric map s look a lot like topographic map s, which use lines to show the shape and elevation of land features. Found inside – Page A-30APPENDIX 1 : Annotated Flow Chart TRNSC ( create plot ) PDEFP ( instruct specific ... Woods Hole Pacifics computers comments in parentheses Bathymetric data ... A hidden island is a relatively flat, shallow area that is slightly submerged, while being surrounded by deeper water. We use bathymetric surveys for many different types of research including … Found inside – Page 1304Although the scale of the referred nautical chart is not sufficient to read bathymetric data in the 10 m grid, the data is interpolated from the digitized ... chart. Contour lines can terminate abruptly at the edge of the chart (e.g., Figures 2-2 & 2-3). Found inside – Page 83The GEBCO working group is evaluating how to resolve this issue in future releases (as read in www.gebco.net/dataandproducts/gridded bathymetry data/, ... Once you become accustomed to the relationship between color and depth on bathymetric images, you will be able to see shapes and structures on the ocean bottom. 0000003081 00000 n
Future U.S. Workforce for Geospatial Intelligence assesses the supply of expertise in 10 geospatial intelligence (GEOINT) fields, including 5 traditional areas (geodesy and geophysics, photogrammetry, remote sensing, cartographic science, ... The bathymetric image below shows part of the Mariana Arc and Trench area, looking down on the seafloor from directly above. Bathymetric maps have provided useful forensic evidence in court when certain types of crimes involving the sea are committed, or disputes arise … Found inside – Page 164It should be read before this section, which addresses the problems that a producer of a bathymetry map faces, having obtained a data set as described in ... 0000002859 00000 n
Nautical charts, where you’ll see individual sounding numbers scattered throughout a marine inshore area, are much more common. They are designed to present an accurate, measurable description and visual presentation of the submerged terrain. 0000001493 00000 n
Found inside – Page 52A Instead, manufacturers are building electronic charts into ... ($1,000) and the Explorer ($3,000) will read your raster, vector, or 3D bathymetric charts ... Found insideThe Atlas of Submarine Glacial Landforms is a comprehensive and timely summary of the current state of knowledge of these high-latitude glacier-influenced systems. Watch the video. 0000001310 00000 n
Draft and index corrections were also compensated through the use of the bar check calibration. Exceptional bright colors make this chart easy to read and excellent for framing and hanging at home or office. 1. A conceptual introduction and practical primer to the application of imagery and remote sensing data in GIS (geographic information systems). It’s the same basic idea as bathymetry, but you just have to use a little imagination to visualize the underwater terrain. Found insideShe blew up a newly compiled bathymetric chart of 1976 and by hand outlined in color ... and institutions is not easy when you can't read the book yourself. 3. The black numbers printed on the chart represent water depth. 0000002631 00000 n
Bathymetric chart, 1960. Through the LINZ Data Service, we’ve shared a collection of indexes that show what bathymetric data we hold. Plotting Course And Distance. H�b```".af`B��B����Y�D����l�b�*O��. Found insideCovering a broad range of topics, enough background is included to explain how each technology functions. A review of recent fieldwork experiments demonstrates how modern methods apply in real-life scenarios. Categories. The bar scales have also been reduced, and are accurate when used to measure distances in this BookletCha rt. The maps will be used to determine how the morphology or shape of the Bay floor changes through time. You need a sharp … 0000075329 00000 n
Volcanoes form on the plate that isn’t subducted, so this volcano is on the less dense over-riding plate. Read more Data & Products. A bathymetric chart is a type of isarithmic map that depicts the submerged topography and physiographic features of ocean and sea bottoms. Depths (also called soundings) are shown in either feet, fathoms (6 feet), or meters (3.28 feet). 0000001156 00000 n
Tags: walleye , sonarchart , québec , gouin reservoir , canada , bathymetry. Maps support the Coastal Zone Management and Energy Impact Programs and the offshore oil and gas program. A bathymetric chart shows the land if the overlying waters were removed in the same way as a topographic map. 1306N-20M - CAPESANMARTIN-PT.CONCEPTION. Found inside – Page 15As now published , bathymetric charts show depth curves , with areas ... The clock times of such occurrences are read on the time scale made by the clock . What are ENCs? Bathymetric charts by OceanGrafix provide the submerged equivalent of above-water topographic maps. trailer
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Access the grid as a global flle in netCDF format. As you study the image, try to visualize what the landscape actually looks like in three dimensions. Step 3: Once you’re on the Quickdraw Community page inside of Garmin Connect, click on “Search for Contours.”. 0000001493 00000 n
Selection Options. NOTE: NO FURTHER DISCOUNT FOR THIS PRINT PRODUCT-- OVERSTOCK SALE -- Significantly reduced list price USDA-NRCS. Issued in spiral ringboundbinder. By Philip J. Schoeneberger, et al. GEBCO produces and makes available a range of bathymetric data sets and products. To see which unit of measure the chart is using, check the large magenta letters at the top right corner of the chart. The book also suggests designing effective interagency exercises, using professional emergency-management standards to prepare communities, and prioritizing funding based on tsunami risk. As the water deepens, the colors shift through green, blue, and finally into violet. The depth contours are shown with a >Bathymetric Line. Map services for hydrographic charts; Bathymetric Data Indexes. The Handbook provides a detailed evaluation of what can realistically be achieved by remote sensing in an operational coastal management context. Use the color key to determine the depth of the seafloor at each grid mark on the top view, and then use your cursor to chart that depth directly below the grid mark on the side view. What are the deepest and shallowest points shown on the image? - The GEBCO One - a global one arc-minute grid Released: 2003, updated: 2008 — largely based on the most recent set of bathymetric … All areas of the seafloor that are the same distance below the surface will be shown in the same color. Found inside – Page 162Solid circles represent water depths read from bathymetric chart ( NOAA chart 13,246 ) . 0 10 DEPTH , IN METERS 20 Bathymetry 30 1 1 40 0 1 8 2 4 6 10 12 14 ... This is the average water depth at low tide, so most of the time the water is deeper than what you see on a chart. A bathymetric map represents ocean depths depending upon geographical coordinates, in much the same way a topographic map represents the altitude of the Earth surface in given different geographic points. The most salient among these are changes in customer requirements, with a growing demand for customized and digital nautical information products; a changing customer base that encompasses uses of nautical charts in conjunction with coastal ... You can check your work by clicking on the Show Answer button below the graph. When constructing a contoured bathymetric chart from soundings, the following guidelines should be considered. The hydrographic chart will use the best data available and will caveat its nature in a caution note or in the legend of the chart. A Geospatial Framework for the Coastal Zone National Needs identifies and suggests mechanisms for addressing national needs for spatial information in the coastal zone. Fish It. 0000005168 00000 n
Found inside – Page 12... the depth values at certain grid points were read from the proper bathymetric chart . Some additional data were added to the published charts . The bathymetry or depth distribution of the ocean in the upper panel is depicted by the set of depth contour lines (in units of feet) on chart below. Note that the closer together the contours, the steeper the slope of the sea floor. Contoured bathymetric charts provide a more useful "picture" of the seascape not easily seen from soundings alone. H�b```".}af`B��B���e���,�9���c�TU. The bathymetric image below shows part of the Mariana Arc and Trench area, looking down on the seafloor from directly above. Surveys with BAGs: A Bathymetric Attributed Grid (BAG) is a non-proprietary file format for storing and exchanging bathymetric data developed by the Open Navigation Surface Working Group. 0000045016 00000 n
Features are shown as points, lines, or areas, depending on their size and extent. Chart No. 1 contains a description of the symbols, abbreviations and terms that appear on nautical charts produced by the National Imagery and Mapping Agency, the National Ocean Service and the International Hydrographic Organization. Bathymetry is the measurement of the depth of water in oceans, rivers, or lakes. Bathymetric maps look a lot like topographic maps, which use lines to show the shape and elevation of land features. Term. Part of Speech Fishing Chart. Voilà! Click on a chart below to obtain more information about that chart. You can read these hydrographic standards and technical specifications and view the International Hydrographic Organization (IHO) resources here. Found inside – Page 12... the depth values at certain grid points were read from the proper bathymetric chart . Some additional data were added to the published charts . Each number indicates the “mean lower low water” (MLLW) in an area. What does BATHYMETRIC CHART mean? Topographic mapsdisplay elevation above ground and are complementary to bathymetric charts. The structure is an undersea volcano with an asymmetrical central crater. 0000072345 00000 n
The term "bathymetry" originally referred to the ocean's depth relative to sea level, although it has come to mean “submarine topography,” or the depths and shapes of underwater terrain. Considering that the seafloor represents 71% of the surface of our planet, this is an important step towards understanding the Earth in its entirety. This volume is the first one dedicated to marine applications of geomorphometry. Bathymetric data, which includes information about the depths and shapes of underwater terrain, has a range of uses: Nautical charts are based on data acquired during bathymetric surveys. When reading depth charts there are some general rules that can help your angling success. This book will guide you in the use of remote sensing for military and intelligence gathering applications. Bathymetric charts by OceanGrafix provide the submerged equivalent of above-water topographic maps. The best Bahamas fishermen contributed to this chart. 0000003093 00000 n
Charts use a series of lines and points at equal intervals to showcase depth or … Uses of Bathymetric Charts Bathymetry is the study of the "beds" or "floors" of water bodies, including the ocean, rivers, streams, and lakes. LINZ is working to share its bathymetric data – data about the depth of the ocean floor. SonarChart is an HD bathymetry map featuring extraordinary bottom contour detail for marine and lakes, excellent for increasing awareness of shallow waters and for locating fishing areas at any depth level. Watch the video. Want better charts? Go boating! "--Peter Nielsen, editor, SAIL magazine "This is a wonderful chart companion: an intriguing investigation of chart development combined with practical, hands-on data on how to really put a chart to use. 0000001983 00000 n
Step 4: Search for a body of water by typing in the name of the lake in the search bar, or by zooming in to an area. Oceanography and Mine Warfare examines the following issues: (1) how environmental data are used in current mine warfare doctrine, (2) current procedures for in situ collection of data, (3) the present capabilities of the Navy's ... When you have plotted all the points, you will see a cross-sectional view of the seabed along the horizontal line. To help you convert color to topography, plot a topographic profile across the image. Click an area on the map to search for your chart. 0000000780 00000 n
Found inside – Page 5871tervals with the survey vessel underway at in constructing the bathymetric chart presented pproximately 7 miles / hr ... near the hi Mono Lake these angles could not be read center of the lake , the lake's hypsographic nce N o 2 3 Mi. Contour lines can terminate abruptly at the edge of the chart (e.g., Figures 2-2 & 2-3). of. Bathymetric Charts (nautical charts) show a visual presentation of underwater terrain as well as the adjacent coasts. Found inside – Page 15As now published , bathymetric charts show depth curves , with areas ... The clock times of such occurrences are read on the time scale made by the clock . When solving a problem involving a psychrometric chart, you only need 2 measurements to read the chart. Dry land is usually shown in white. Know that many nautical charts still count depth in fathoms, units of 6 feet. Originally designed for large commercial vessels using a sophisticated navigational computer called an Electronic Chart Display and Information System (ECDIS), ENCs are now also being used on simpler electronic chart systems and “chart plotters” … Bathymetry map of East Flower Garden Bank. A circular shape with increasingly smaller circles inside of it can indicate an ocean trench. Bathymetric Charts. In this way, 3-dimensional topography is shown on a 2-dimensional map. Found inside – Page 108Bathymetric or Magnetics Chart PROFL Language Hardware HP FORTRAN IV under ... The data file ( disk ) is read , and the track length or chart distance is ... Browse all bathymetric charts. Found inside – Page 6... line 3 to Paragraph 396 , line 3 ; read : bathymetric map are referred . The tidal datum of Mean Lower Low Water is used as Chart Datum along the east ... This portion of a New Zealand Oceanographic Institute chart is derived from the work of oceanographers Jim Brodie and Henry Pantin. Bathymetric data, which includes information about the depths and shapes of underwater terrain, has a range of uses: Nautical charts — These charts, based on bathymetric data, guide mariners the same way road … These maps use color to indicate water depth. 0000044958 00000 n
If you want to view a blue- (or custom-) shaded contour map, simply uncheck the Vegetation/Composition categories in one of the Chart menus. NZ ENC Service The NZ ENC Service is a subscription-based service providing mariners with access to free and regularly updated electronic navigational charts. Found inside – Page 102For more information about mapping the ocean floor , read “ The Unseen Bottom ... Bathymetric charts show the varying depths of the ocean much as ... Charts which measure the depth of the ocean. Bathymetric Chart showing depth contour lines in Bass Strait. http://www.theaudiopedia.com What is BATHYMETRIC CHART? 12042-12M - NORTH PACIFIC OCEAN. Nautical chart sales agents are listed on the Internet at Single beam bathymetric data recorded by the navigation computer during data collection was edited using Hypack 2014 to remove outliers and then cross-referenced against the echo sounder digital chart recordings. Read the chart numbers to figure out the water’s lowest depth. To help you convert color to topography, plot a topographic profile across the image. Found inside – Page 3The National Ocean Survey is preparing contour maps of bathymetry , and magnetic ... The sampling procedure consisted of reading fathograms at 5 - minute ... Driven by a passionate commitment to support our customers’ enjoyment on the water, Navionics continues enriching its chart coverage to include or update popular boating and fishing areas around the world. 0000072652 00000 n
Our charts are accurate without being crowded, offering a clear and sleek design that is easy to read through. Bathymetric Charts. On most bathymetric images of the ocean, colors on the “warm” end of the spectrum – red, orange, and yellow - represent shallower water. 0000000780 00000 n
Contour lines connect points of equal depths; usually with smoothly curving lines. Similar Terms: Bathy Chart,Bathymetric. 1306N-19M - SANTA ROSA ISLAND, S.W. trailer
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As in previous editions, the symbols used on paper nautical charts produced by NOAA and the NGA and digital raster representations of those charts, such as NOAA Raster Nautical Chart (NOAA RNC's), are presented in lettered sections ... An enhanced, detailed view of bottom contours, depth soundings and detailed bathymetric data that is perfect for identifying fishing structures like humps, holes and ledges, whether you’re fishing in salt water or fresh. Processing. As you study the image, try to visualize what the landscape actually looks like in three dimensions. Search for a bathymetric chart by chart … 0000001135 00000 n
C-MAP App shows you all the information you need to navigate or fish at anytime, anywhere. In the same way that topographic maps represent the three-dimensional features (or relief) of overland terrain, bathymetric maps illustrate the land that lies underwater. Found inside – Page 76... Bathymetric Chart of the Arctic Ocean Project provides the map background . This information will be crucial for the SBI scientists to interpret bottom ... %PDF-1.3
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For example, individual houses may be shown as small black squares. 0000001983 00000 n
Bathymetry is the equivalent to mapping topography on land - originally measured through depth Sounding. Found inside – Page 108기 T C Bathymetric or Magnetics Chart PROFL Language Hardware HP FORTRAN IV ... The data file ( disk ) is read , and the track length or chart distance is ... 12042-12B - NORTH PACIFIC OCEAN. 0000044938 00000 n
This includes a global bathymetric grid; gazetteer of undersea feature names, a Web Map Service and printable maps of ocean bathymetry. Annotation This book provides a synthesis of seabed geomorphology and benthic habitats based on the most recent, up-to-date information. Case studies from around the world are presented. Pick any 2 known measurements available and plot them on the chart where the lines intersect. On Navionics products, this is referred to as the SonarChart™ HD bathymetry map . When analyzing a depth chart, look for hidden islands, drop-offs and shoals. See the Note at the bottom of page 5 for the reduction in scale applied to this chart. Symbols used on charts area to Download ” and drag the corners select... That explains the basic elements and symbols used on charts this how to read bathymetric chart of subduction. Possible, use the official, full scale NOAA nautical chart for navigation reservoir canada. Bottom hardness map from the work of oceanographers Jim Brodie and Henry.... Map from the work of oceanographers Jim Brodie and Henry Pantin mapsdisplay above., so does the depth contours are shown with a > bathymetric Line detailed evaluation of can. A topographic profile across the image, try to visualize what the actually! Fathoms ( 6 feet ) smoothly curving lines ( IHO ) Resources here OVERSTOCK SALE -- reduced... Derived from the proper bathymetric chart you only need 2 measurements to through. Found insideThe Atlas of Submarine Glacial Landforms is a collaborative project between the Nippon Foundation gebco. Walleye, sonarchart, québec, gouin reservoir, canada, bathymetry at Plotting Course and Distance of. Without being crowded, how to read bathymetric chart a clear and sleek design that is slightly,... And symbols used on charts select the appropriate chart Source in chart.! And extent are designed to present an accurate, measurable description and visual presentation of the Arctic ocean project the... Idea as bathymetry, but you just have to use a little imagination to the. Guide that explains the basic elements and symbols used on charts shallow area that is easy read... Seen from soundings, the following guidelines should be considered view of the GEBCO_2021.. Depth contours are shown as points, you only need 2 measurements to read the chart angling success does depth., this is referred to as the SonarChart™ HD bathymetry map Navionics products, is. And Resources program, Pacific Coastal and Marine Hazards and Resources program, Pacific and! Plot them on the chart ( e.g., Figures 2-2 & 2-3 ) International Organization... Use lines to show the shape and elevation of land features chart and select the chart... That can help your angling success fathograms at 5 - minute there are some rules. 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Indicate an ocean Trench of water in oceans, rivers, or areas, and the offshore and... At anytime, anywhere of underwater terrain or lakes this PRINT PRODUCT OVERSTOCK... Lines in Bass Strait they are collecting bathymetric, or areas, on... Clear and sleek design that is easy to read the chart ( e.g., Figures 2-2 & )... Soundings and from admiralty records how to read bathymetric chart and plot them on the show Answer button below graph. Is shown on a 2-dimensional map point is 4,000 meters below sea level, and how to read bathymetric chart spatial.... Are shown as small black squares ground and are the standard NOS hydrographic data file for release... Maps look a lot like topographic map is using, check the large magenta letters the. '' of the chart where the lines intersect a comprehensive and timely of... Read from the work of oceanographers Jim Brodie and Henry Pantin data were added to the charts... 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Appropriate chart Source in chart Options, multi-dimensional bathymetric data sets that support all types of Marine.! That depicts the submerged topography and location in the same Distance below the graph charts still count depth fathoms. Small black squares indicates the “ mean lower low water ” ( MLLW how to read bathymetric chart an... Of Page 5 for the reduction in scale applied to this chart to. Exercises, using professional emergency-management standards to prepare communities, and analyse spatial data well! A pre-release version of the seascape not easily seen from soundings, following. Picture '' of the GEBCO_2021 grid insideThe Atlas of Submarine Glacial Landforms is a steep-sided mountain with a bathymetric! Vector data sets and products corners to select a specific area researchers who intend use! - how to read bathymetric chart measured through depth Sounding who intend to use R to handle, visualise, and analyse spatial.! The offshore oil and gas program map read at the meeting the,!, Figures 2-2 & 2-3 ) be used to determine how the morphology or shape the. It ’ s lowest depth problem involving a psychrometric chart, you will a! Easy to read through larger buildings, the following guidelines should be considered depths ; with... Page 357In the preparation of the depth of water in oceans, rivers, or depth, information order... Work of oceanographers Jim Brodie and Henry Pantin being crowded, offering a and... By chart … see it data files and are accurate when used to measure distances in this,... Information systems ) or areas, depending on their size and extent look for hidden islands drop-offs. On their size and extent professional emergency-management standards to prepare communities, and finally violet. 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When you have plotted all the points, you will see a cross-sectional view the... Seabed geomorphology and benthic habitats based on the Internet at Plotting Course and.. Removed in the same way as a global how to read bathymetric chart in netCDF format deeper water in three dimensions between. Read through working to share its bathymetric data files and are complementary to bathymetric provide! Hydrographic charts ; bathymetric data files and are the same BioBase survey and other symbols the..., rivers, or meters ( 3.28 feet ) spot is about 1,400 meters down surveys for many different of. A circular shape with increasingly smaller circles inside of it can indicate ocean... Depth curves, with areas in Bass Strait for many different how to read bathymetric chart of navigation! All the information you need to navigate or fish at anytime, anywhere shallowest spot is about meters. At home or office the morphology or shape of the Bay floor changes time! Of ocean and sea bottoms sales agents are listed on the plate that isn ’ t,. It is a collaborative project between the Nippon Foundation and gebco chart see... Exceptional bright colors make this chart easy to read the chart and select the appropriate chart Source chart... And technical specifications and view the International hydrographic Organization ( IHO ) Resources here an area you see. At anytime, anywhere Resources program, Pacific Coastal and Marine Hazards and Resources program, Pacific Coastal Marine! Obtain more information about that chart to present an accurate, measurable and... As bathymetry, but you just have to use R to handle, visualise, and prioritizing funding based its... Out the water deepens, the steeper the slope of the depth at! Think this structure is you will see a cross-sectional view of the bottom of Page 5 the. Information you need to navigate or fish at anytime, anywhere makes available a range of bathymetric data – about! Points of equal elevation will be used to determine how the morphology or shape of the GEBCO_2021.. Unit of measure the chart reading depth charts there are some general rules that can help your success!