M-H712-FH11Florida to North Carolina Track LineFlorida to North CarolinaNOAA Ship FERDINAND R. HASSLER (S-250)D001581Hydrographic Survey Project Instructions M-H712-FH-11, FinalFlorida to North CarolinaFloridaGeorgiaNorth CarolinaSouth CarolinaUnited States400002011LCDR Benjamin K. Evans, NOAANavigable AreaSupport NMS2011-06-092011-06-052011-06-08Multibeam Echo SounderMultibeam Echo Sounder BackscattermetersMean Lower Low WatermetersMean Lower Low WaterUniversal Transverse Mercator (UTM)UTCPacific Hydrographic BranchHorizontal Coordinate System: UTM Zones 17 and 18. The purpose of this survey is to provide contemporary survey to update National Ocean Service (NOS) charts. All separates are filed with the hydrographic data. Revisions and notes in red were generated during office processing. The processing branch concurs with all information and recommendations in the DR unless otherwise noted. Page numbering may be interrupted or non sequential. All pertinent records for this survey, including the Descriptive Report, are archived at the National Geophysical Data Center (NGDC) and can be retrievedHYPERLINK "http://www.ngdc.noaa.gov/" \h via http://www.ngdc.noaa.gov/.This survey consists of two separate sections. A track line survey was conducted en route from Key West, FL to offshore NC. The NOAA Hydrographic Surveys Division provided way points for the track line portion of this survey (Figure 1) in their project instructions. The leg from the Dry Tortuga to Key West, FL was omitted for time and traffic constraints. Figure 4 illustrates the actual track of data acquisition. A second survey was conducted over two AWOIS items offshore of Cape Hatteras, NC. The two AWOIS items are less than a nautical mile apart and are notated by the red star in Figure 2. These AWOIS items are two US battleships intentionally sunk after World War One for aerial bombing experiments.35.05914375.21551424.22840783.2174151Florida to North Carolina Track Line way points.file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/TrackLine_Positions.png2AWOIS position included in Project instructions.file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/AWOIS_position.pngThe trackline portion of this survey did not meet Specification and was not compiled. This survey was conducted as a preliminary test of NOAA Ship FERDINAND R. HASSLER's multibeam systems. The track line segment of this survey was to provide bathymetry and backscatter data for fisheries science. This data is not intended for chart comparison or updates. The second segment of this survey was to obtain modern multibeam sonar coverage over two known AWOIS items in support of the Monitor National Marine Sanctuary. These AWOIS objects are WWI vintage American Battleships, sunk during Billy Mitchell's aerial bombing experiments in 1923. This data could support ONMS efforts at expanding the Monitor NMS, as it is the first modern multibeam survey over these two wrecks.3Sunken ships 'USS NEW JERSEY' and 'USS VIRGINIA'.file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/8M%20Base%20surface.pngThe survey is partially adequate to supersede previous data.The track line portion of this survey was conducted to test NOAA Ship FERDINAND R. HASSLER (S-250) systems and is not of chart quality. No water level or sound speed profile corrections have been applied, and the dataset does not meet sounding density requirements due to high vessel speed. The hydrographer recommends that the track line dataset be archived as-is, with no further processing or review for chart application. The survey of the two AWOIS items meets applicable data quality requirements. However, water level corrections were not applied. IHO order 2 standards are met due to the relatively small tidal range (+/- 0.5 meters) and larger allowable uncertainty (approximately +/- 2.5 meters). Therefore, there is no appreciable benefit to applying water level data. The trackline portion of this survey did not meet Specification and was not compiled. The survey data of the AWOIS items is adequate to supersede charted data. Survey Limits were acquired in accordance with the requirements in the Project Instructions and the HSSD.4Track line and AWOIS acquired navigation data overlaid on applicable charts.file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/D000158_coverage.pngThe track line was followed as closely as possible with cross track errors varying between 30-200 meters, yet sometimes it was necessary to deviate due to traffic. During periods after system crashes data were not recorded.2011-06-052011-06-062011-06-072011-06-080001.050548.4600000000Shoreline data was neither required nor acquired.There was no shoreline investigation completed for this survey.MMA Bottom samples were neither required nor acquired.There were no bottom samples obtained for this survey.MMARefer to the Data Acquisition and Processing Report (DAPR) for a complete description of data acquisition and processing systems, survey vessels, quality control procedures and data processing methods. Additional information to supplement sounding and survey data, and any deviations from the DAPR are discussed in the following sections.S-25037.73.85Reson7111MBESSea-BirdSeaCat 19Sound Speed SystemApplanixPOS/MV 320 V4Positionaning and AltitudeHemisphereMBX-4Positioning SystemCrosslines were neither required nor performed for the track line segment of this survey. All AWOIS investigation survey lines were conducted in a crossing pattern to meet the 4 percent crossline requirements. No significant discrepancies were identified.Track line data uncertainty has not been assessed. The IHO recommends Order 2 for areas greater than 100m deep where a general depiction of the seabed is adequate and the likelihood of features affecting surface navigation is low. Since the sunken battleships are by far the most significant feature in this area, and are well represented in this data set, the hydrographer suggests that Order 2 is appropriate. Figure 5 illustrates the total vertical uncertainty analysis; green areas meet IHO Order 2 total vertical error requirements, red areas do not. Red sections result from outer beam data analysis on the sheet boundaries and are not directly over the AWOIS items.5Total vertical uncertainty base surface for AWOIS items (8m). file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/IHO.pngThe survey data of the AWOIS items is adequate to supersede charted data. Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR.Hysweep CrashesSoftware crashes along the track line resulted in data gaps. This problem was not logged in any more detail.6Track line data with evident gaps from software crashes.file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/Trackline_data-gaps.pngNo Detected FactorsThere were no other significant factors that affected corrections to soundings. Factors such as sea state and water column data were not recorded.No sound speed profile was acquired for the trackline data. One CTD cast was taken on Dn159 for the AWOIS investigation.According to the survey log, on Dn157 it was noted at 1746 that surface sound velocity input was missing. Upon investigation in Caris swath editor, surface sound speed artifacts are not evident. The survey data of the AWOIS investigation is adequate to supersede charted data. All Equipment and survey methods were used as detailed in the DAPR.All data reduction procedures conform to those detailed in the DAPR.All sounding systems were calibrated as detailed in the DAPR.Water column backscatter was logged in the s7k files and submitted directly to NGDC, and is not included with the data submitted to the Branch. There is no plan to further process or investigate this data.Version 5.2D00158_8m (includes AWOIS items only)CUBE889.51134.56NOAA_8mComplete MBESThe one surface submitted includes only the AWOIS survey. All data fell within the depth range requiring 8m resolution. No surface was created for the track line data.A 4 meter finalized surface (D00158_4m_Final) was created during office processing and used for compilation. Noise to PortsideMore noise was observed in the port-side of the data swath. As the Reson 7111 is mounted in the Starboard hull, we believe the outer beam data is bouncing off the port-side hull.7Track line data acquired from Reson 7111 in a snapshot from CARIS subset editor (rear view). Gray points are rejected soundings and are more pronounced on the port side (red).file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/Noise%20to%20port_subset%20editor.pngFilters AppliedAll track line data has 45 degree filters applied to port and starboard sides. AWOIS data was cleaned with Caris subset and swath editors without any filters applied.The survey data of the AWOIS items is adequate to supersede charted data. Critical SoundingsTwo critical sounding were identified (outstanding) for the purpose of feature creation by exporting to Pydro.Per project instructions, zero-tides and DGPS correctors were applied. Therefore, this data is not sufficient to supersede previous chart sounding data. Mean Lower Low WaterThe trackline portion of this survey did not meet Specifications and was not compiled. As explained in section A.3, the tidal range was small and only a portion of the allowable uncertainty for this offshore survey with a depth area of 90-135 meters. The survey data of the AWOIS items is adequate to supersede charted data. North American Datum of 1983 (NAD83)Key West (286 KHz)Card Sound (314 KHz)Cape Canaveral (289 KHz)Kensington (292 KHz)New Bern (294 KHz)Driver (289 KHz)USCG Differential GPS correctors were applied to all positioning data. No record was kept as to which station was used at given times and locations. The hydrographer assumes that the DGPS receiver was configured to auto track the strongest station. The DGPS stations and frequencies listed are located along the trackline route. New Bern was most likely the station used for AWOIS items. There is no chart comparison requirement for this project. Track lines and AWOIS items cover charts 411, 11009, 11520 & 11555.MMA20The two AWOIS items assigned for investigation are the known sunken battleships USS NEW JERSEY (#14918) and USS VIRGINIA (#14917) offshore Cape Hatteras, NC. Two wrecks were detected in the approximate investigation positions. One wreck is 105 meters southeast of the reported AWOIS position for USS NEW JERSEY, another wreck is 59 meters north-northwest of the reported position for AWOIS USS VIRGINIA. Using Caris software, the most shoal sounding on each wreck was attributed as outstanding. These depths were imported to Pydro and exported into the final feature file. Neither of these wrecks are charted on the largest scale chart (11555, 1:80,000) of this area. The hydrographer recommends charting both wrecks with position and depth from this survey. Due to the reconnaissance nature of this survey and scale of the chart, the hydrographer recommends retention of the surrounding charted depths.The AWOIS Report is appended to this report. An unexploded depth charge is charted in the vicinity of this survey, but was not investigated. The feature corresponded to informational AWOIS item #14919. The charted (11555) position of this unexploded depth charge is partially contained within the survey area (Figure 8). No efforts were made to locate this depth charge nor would the equipment used in the survey be capable of detecting this feature. The hydrographer recommends retaining this feature as charted.8Charted (11555) feature partially outside the reference surface.file:///N:/MH712FH11/Surveys/D00158/Compilation/Report/Components/Charted%20feature-depthcrg.png See section D.1.1. above, regarding AWOIS wrecks.No Danger to Navigation Reports were submitted for this survey.No potentially hazardous features or shoals were investigated within the limits of D00158This survey does not include investigation of channel depths, anchorages, precautionary areas safety fairways, traffic separation schemes, pilotage areas nor range lines.In accordance with the Project Instructions and the HSSD, shoreline was not investigated.This data was not compared to prior surveys. There are no ATONs assigned for this project and none were verified within the limits of D00158.No overhead features were investigated within D00158.No submarine features were investigated within D00158.No ferry routes nor terminals were investigated within D00158.No platforms were investigated within D00158.No significant features, aside from noted AWOIS items, were identified.Offshore construction and dredging were not noted during this survey.No new surveys or further investigations are recommended for this area.Potential for adding the sunken ship AWOIS objects to the USS MONITOR Marine Sanctuary.As Chief of Party, Field Operations, for this hydrographic survey were conducted under my direct supervision, with frequent personal checks of progress and adequacy. I have reviewed the attached survey data and reports.All field sheets, this Descriptive Report, and all accompanying records and data are approved. All records are forwarded for final review and processing to the Processing Branch.The survey data does not meet all requirements as set forth in the NOS Hydrographic Surveys and Specifications Deliverables Manual, Field Procedures Manual, Standing and Letter Instructions, and HSD Technical Directives. These track line sounding data are not adequate to supersede charted data in their common areas nor was this survey intended for that purpose. It is only recommended that charted positions and depths of AWOIS items #14917 and 14918 be updated. This survey is complete and no additional work is required. LCDR Benjamin K. Evans, NOAAChief of Party2012-08-14LT Samuel F. Greenaway, NOAAField Operations Officer2012-08-14LT Madeleine M. Adler, NOAANavigation Officer2012-08-14file:///R:/00_PROJECTS/2011/M-H712-FH-11%20Florida%20to%20North%20Carolina%20Track%20Line/Project_Files/TracklineSurveyLog.pdffile:///R:/00_PROJECTS/2011/M-H712-FH-11%20Florida%20to%20North%20Carolina%20Track%20Line/Project_Files/Instructions/M-H712-FH-11_North%20Carolina%20to%20Flordia%20track%20line_Final_signed.pdf