00.1020010.2S2224N/A0.231014N/A0.231024The method used to calculate Total Propagated Uncertainty values for survey H12483 varied based on the process used to apply water level values to the data. The first method was applied to data reduced to MLLW using a POSPac IAPPK 3D positional solution and a VDatum separation model. For this data, realtime uncertainty values for roll, pitch, gyro, navigation, and elevation were supplied via a SBET RMS file generated by Applanix POSPac. The remaining sources of uncertainty were a combination of: field assigned values for sound speed uncertainties; Operations Branch assigned values for VDatum separation model uncertainty; and a priori values for sonar mounting and vessel speed based on Appendix 4, table 4.9 of the NOAA Field Procedures Manual (ed 2013). Field assigned values for TPU calculation are in tables 6 and 7, Operations Branch assigned values for the VDatum model are in row 2 of Table 6. The second method used to calculate Total Propagated Uncertainty was applied to data reduced to MLLW via TCARI model. This data again used a POSPac IAPPK 3D positional solution, but used a zoned tide grid to reduce the data to MLLW. Uncertainties for this data also used an SBET RMS file for realtime pitch, roll, gyro, navigation, and elevation uncertainties, as well as a priori values for sonar mounting and vessel speed. However, uncertainties for tide gauge measurement, tidal datum computation error, and tidal zoning error were provided by the Center for Operational Oceanographic Products and Services (CO-OPS). CO-OPS assigned values for tidal uncertainty are in row 1 of Table 6. The CO-OPS uncertainty value was provided at the 95% confidence interval. It was divided by 1.96 to provide the 1-sigma value needed by CARIS. Total Propagated Uncertainties for the entire survey were evaluated to ensure compliance with section 5.1.3 of NOAA's HSSD (ed 2013). First, the maximum allowable uncertainty for each node was calculated using the equation: -Uncertainty/(0.5^2 +((Depth*0.013)^2)^0.5). Second, the ratio between the actual uncertainty and maximum allowed uncertainty was found for each node. Out of 138,499,649 nodes, 73,861 did not meet IHO order 1 standards (or 99.99% meet IHO order 1 uncertainty requirements). Most of the nodes that do not pass are on rocks and sandwaves. Multibeam crosslines totaling 17.41 lineal nautical miles comprising 1.9% of hydrography, were acquired during the course of the survey. Only the ship acquired crosslines. Crosslines were compared to mainscheme using a difference surface created in CARIS BathyData Base. Using the difference surface, every instance of overlap was evaluated. The mean was -0.181m and the standard deviation was 0.153m. Survey H12483 does not comply with section 5.2.4.3 of the HSSD (2013 ed) only 1.9 percent of crosslines were acquired and 4% are required. It is not known why the launches did not acquire crosslines. Line plans were created for them. 20000H12482NOAA Ship THOMAS JEFFERSON2013WThe difference between survey H12483 and H12482 ranged from -4.26m to 2.94m. The mean was -0.174m and the standard deviation was 0.167m. Out of 302,870 nodes, 302,712 nodes, or 99.9% are within 1 meter. The nodes exceeding 1 meter of difference are located on rocks and sandwaves. 10000H11999NOAA Ship THOMAS JEFFERSON2008NThe difference between survey H12483 and H11999 ranged from -2.82m to 5.28m. The mean was -0.171m and the standard deviation was 0.392m. Out of 353344 nodes, 328682 nodes, or 94% are within 1 meter. The nodes exceeding 1 meter of difference are located on sandwaves that shifted. Gaps of up to 50 meters are present on the east side. file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_H11999_junction.jpgH12483 H11999 Junction Gap210000H11251NOAA Ship THOMAS JEFFERSON2008NEThe difference between survey H12483 and H11251 ranged from -0.29m to 1.63m. The mean was 0.105m and the standard deviation was 0.104m. Out of 88,076 nodes, 88,059 nodes, or 99.9% are within 1 meter. The nodes exceeding 1 meter of difference are located on rocks. A gap up to 160 meters is present on the east side. file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_H11251_junction.jpgH12483 H11251 Junction GAP3file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_Junctions.jpgH12483 Junctions4Three junction comparisons were made with this survey.There were no conditions or deficiencies that affected equipment operational effectiveness.None ExistThere were no other factors that affected corrections to soundings.None ExistAll equipment and survey methods were used as detailed in the DAPR.No sound speed zoning was required for this survey.NOAA Ship Thomas Jefferson MVP casts about once an hour. Survey launches 3101 and 3102 took CTDs about every four hours.Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR.Each finalized surface was filtered from 0 to 4. These were selected to get the number of soundings that did not meet density. The number of soundings for the entire data set was found by using the compute statistics function in Caris BASE Editor. Density is met 99% of the time for the 2 meter grid. The 0.5 meter grid meets density 98% of the time.H12483 Density ComplianceRefer 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.Data were acquired by NOAA Ship Thomas Jefferson and Hydrographic Survey Launches 3101 and 3102. NOAA Ship Thomas Jefferson acquired Reson 7125-ROV multibeam echosounder soundings, multibeam backscatter data; Brook Ocean Technology MVP100 sound velocity profiles, and Applanix position and attitude data. Both Hydrographic Survey Launches acquired Reson 7125-SV1 multibeam echosounder soundings, multibeam backscatter data; Seabird sound velocity profiles, SV-71 surface sound velocity readings, and Applanix position and attitude data.315.2HSL 3102315.2HSL 310120815S222Vessel configurations, equipment operations, and data acquisition & processing were consistent with specifications described in the DAPRPositioning and Attitude SystemPOS/MV version 4ApplanixConductivity, Temperature, and Depth Sensor Seacat 19+SeabirdConductivity, Temperature, and Depth SensorMVP 100Brook Ocean TechnologyMBES7125 SV1ResonMBES7125 ROVReson Sound Speed SystemSV-71ResonPositioning and Attitude SystemSPS351 DGPS Beacon RecieverTrimbleRaw backscatter was logged as a 7k file and has been sent to the Atlantic Hydrographic Processing Branch. One line per vessel, per day was processed aboard the Thomas Jefferson in order to assess and ensure quality. No deficiencies were noted.All data reduction procedures conform to those detailed in the DAPR.All sounding systems were calibrated as detailed in the DAPR.The following HSL 3101 lines from day number 101 do not have trueheave applied. 101_1946, 101_1959, 101_2000, 101_2003, 101_2007, 101_2010, 101_2013, 101_2020, 101_2021, 101_2026, 101_2029, 101_2031, 101_2034, 101_2036, 101_2038, 101_2039, 101_2041, 101_2043, 101_2044, and 101_2045. Only 65 POSPAC files are applied to that days data. There is no mention in the acquisition log as to how many POSPAC files were acquired on that day or any reason that the POS/MV would have been turned off. Without the missing files, SBETS cannot be created for these lines. Lines Without Trueheave AppliedLaunch 3101 DN 097 Line 097_1436 CARIS gave the following error when applying SBETs. The SBET time extents does not overlap the line. When applying RMS it gave the error all error files must either be POSMV or POSPAC. It was processed using trueheave only. DN 101 Line 101_1516 would not take RMS. No error given. This line seems like it has other problems. DN 106 Line 106_1725 has no RMS. CARIS execution failed. Error code 160510. S222 DN 100 Line 17_18_22 CARIS gave the following error when applying SBETs. The SBET time extents does not overlap the line. This line has no RMS or GPS tides. It was processed using trueheave only. DN 100 Line 17_52_32 CARIS gave the following error when applying SBETs. The SBET time extents does not overlap the line. This line has no RMS or GPS tides.It was processed using trueheave only. DN 106 Line 500_1248 CARIS gave the following error when applying SBETs. The SBET time extents does not overlap the line.This line has no RMS. It was processed using trueheave only. DN 106 Line 514_2016 Caris gave the following error when applying RMS. A gap of 269 seconds between 2013 04 16 20:16:40.00 and 2013 04 16 20:21:09.09 has been found in the records for the line. This line has no RMS or GPS tides. It was processed using trueheave only. DN 107 Line 708_1954 CARIS gave the following error when applying SBETs. The SBET time extents does not overlap the line. It was processed using trueheave only. DN 107 Line 903_1608 CARIS gave the following error when applying SBETs. An error occurred while applying SBET (tried twice). It was processed using trueheave only.Lines without SBETs/RMSSurface sound speed input into the RESON 7125-SV1 unit was periodically lost due to high sea state. The loss caused heavy refraction in the outerbeams. Areas where this occurred had the outer beams removed. Rejecting a particularly bad one left a holiday. SSV Bowoutsfile:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_SSV_blowouts.jpgH12483 Examples of Areas with SSV Blowouts5file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_SSV_blowout_subset.jpgH12483 SSV Blowout Subset6Motion artifacts are present in line 089_1826. This line is located in the inshore area and runs the entire length of the survey area. Line 100_1257 also has some motion artifacts. Sections of this line that did not leave holidays were removed. The outer beams had motion artifacts of up to 0.6 meters. Those outerbeams were removed. Lines With Motion Artifactsfile:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_Motion_Artifacts.jpgH12483 Motion Artifacts7Vertical offsets are present mostly on the west side of survey H12483. The most noticeable separation is in the southwest area close to shore where the maximum value is 0.37 meters. The offset is caused by an unknown error causing the vertical element of the IAPPK solution to fail. Despite the offset the data remains within IHO order 1 specification.Vertical Offset Anomalyfile:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_vertical_offsets.jpgH12483 Vertical Offsets8file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_vertical_offsets_subset.jpgH12483 Vertical offsets in Subset Editor9NOAA Profile V_5_3_2H12483_MB_50cm_MLLW_Final.csar0.5CUBEObject Detection220.39NOAA_0.5mH12483_MB_2m_MLLW_Final.csar2.0CUBEComplete MBES38.2118NOAA_2mThe survey data meets or exceeds requirements as set forth in the NOS Hydrographic Surveys and Specifications Deliverables Manual, Field Procedures Manual, Standing and Letter Instructions, and all HSD Technical Directives. These data are adequate to supersede charted data in their common areas. This survey is complete and no additional work is required with the exception of deficiencies noted in the Descriptive Report.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.2014-04-10CDR James M. Crocker, NOAACommanding Officer2014-04-10LT Megan Guberski, NOAAField Operations Officer2014-04-10LT(jg) Charles Wisotzkey, NOAAAcquisition Manager2014-04-10HST Kimberly GlombSheet ManagerAn area of the survey area was not covered due to technical issues with the VDATUM model during data acquisition. An approximately 370 meter long holiday is present in the north east with a smaller holiday next to it. Other small holidays are present inshore. 41.006666666772.379333333341.10672.5558333333This hydrographic survey was completed as specified by hydrographic survey project instructions OPR-B370-TJ-13, signed 13 February 2013 and all other applicable direction. This survey was conducted in Eastern Long Island Sound in the vicinity of Mattituck Inlet, NY.CJWDue to the shape of this survey sheet, the position provided in section A.1 does not reflect the extents of the area surveyed. Refer to the image provided in section A.4 for position information.The entire survey is adequate to supersede previous data.Survey Coverage was in accordance with the requirements in the Project Instructions and the HSSD.file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_Survey_Area.jpgH12483 in Relation to the Project Area10879.620017.411.900000336.150017.410000S2220385.43000000031010158.040000000310220000012013-03-302013-03-312013-04-052013-04-062014-04-072013-04-082013-04-092013-04-102013-04-112013-04-152013-04-162013-04-172013-04-182013-04-192013-04-20This project is being conducted in support of NOAA's Office of Coast Survey to provide contemporary hydrographic data in order to update the nautical charting products and reduce the survey backlog within the area. Data from this project will support the Long Island Sound Seafloor Mapping Initiative in New York and Connecticut.Additional information discussing the vertical or horizontal control for this survey can be found in the accompanying HVCR.Mean Lower Low WaterThe original TCARI file given is called B370TJ2013.tc. The new TCARI file given is called B370TJ20132_Final. The subordinate gauge Mattituck Inlet, NY was installed for this project. 8461490_verified.tidFinal8465705_verified.tidFinal8512668_verified.tidFinalB370TJ2013.tcFinal ApprovedTCARI2013-06-072013-04-228641490New London, CT8465705New Haven, CT8512668Mattituck Inlet, Long Island, NY2013_B370_VDatum_NAD83Ellip_MLLW_rev.xyzVDatumUTM zone 18Moriches, New York (293 kHz)CTGRCTGRCTGUCTGUCTNECTNEMOR5MOR5NYRHNYRHZNY1ZNY1NYClNYClCTDACTDANHRHNHRHZNY2ZNY2Smart BaseNorth American Datum of 1983 (NAD83)Basic Hydrographic SurveyUTCAtlantic Hydrographic Branch2013-04-202013-03-30Universal Transverse Mercator (UTM)Multibeam Echo Soundermeters2013-02-13CAPT Lawrence T. Krepp, NOAA2013Mattituck Inlet to GreenportH1248320000United States2New YorkNOAAEastern Long Island SoundNOAA Ship THOMAS JEFFERSONLong Island SoundOPR-B370-TJ-13No ferry routes or terminals exist for this survey.No significant features exist for this survey.The CSF was compared to the area covered. Some features and the shoreline were outside the survey coverage. No new surveys or further investigations are recommended for this area.No new insets are recommended for this area.No overhead features exist for this survey.No submarine features exist for this survey.No present or planned construction or dredging exist within the survey limits.No platforms exist for this survey.Comparisons were only made to the chart.No Aids to navigation (ATONs) exist for this survey.In general the soundings agree within 0.6 meters. There are some areas on the south west side that are up to 7 meters deeper. Figure 10 shows the areas that are shallower than charted and figure 11 shows the areas that are deeper than charted.file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_Shallow.jpgH12483 Shallower Areas10file:///I:/H12483/H12483_Data/Descriptive_Report/H12483_DR_images/H12483_Deep.jpgH12483 Deeper Areas112014-02-146US5NY1IM400002013-06-05falseIn general the soundings agree within two feet. There are some areas on the south west side that are up to 23 feet deeper. There are rocks and sandwaves in the survey area.212014-03-182014-03-294000022192011-0712358No channels exist for this survey. There are no designated anchorages, precautionary areas, safety fairways, traffic separation schemes, pilot boarding areas, or channel and range lines within the survey limits.One AWOIS item is present in the survey area. It is addressed. Consult the H12483_FFF for information about the AWOIS item in the survey area. Numerous rocks exist throughout the survey area. These were acquired with Reson 7125 object detection multibeam. The tallest rocks have designated soundings. Thirteen rocks were submitted as DTONs.Four charted items are present in the survey area. Consult the H12483_FFF.hob for more information about the charted features in the survey area.A sounding plot of H12483 was created from the ENC and RNC charts.No Maritime Boundary Points were assigned for this survey.A danger to navigation report containing thirteen dangerous rocks was submitted on 28 March 2014. 1Forty uncharted features were found. Consult the H12483_FFF.hob for more information about the uncharted features in the survey area. Bottom samples were assigned for this survey. They were acquired. The target files have been lost and are not recoverable. No bottom samples are in the FFF.