S-A928-NRTNL-23 Cape Cod Bay Cape Cod Bay NOAA NRT-New London H13793 2 Provincetown Harbor Massachusetts United States 10000 2023 LTJG Mark Meadows Navigable Area 2023-04-12 2023-09-27 2023-10-02 Multibeam Echo Sounder meters UTC Pacific Hydrographic Branch Any revisions to the Descriptive Report (DR) applied during office processing are shown in red italic text. The DR is maintained as a field unit product, therefore all information and recommendations within this report are considered preliminary unless otherwise noted. The final disposition of survey data is represented in the NOAA nautical chart products. All pertinent records for this survey are archived at the National Centers for Environmental Information (NCEI) and can be retrieved via https://www.ncei.noaa.gov/. Products created during office processing were generated in NAD83 UTM 19N, MLLW. All references to other horizontal or vertical datums in this report are applicable to the processed hydrographic data provided by the field unit. CC0-1.0 (NOAA Field Units) CC0-1.0 https://creativecommons.org/publicdomain/zero/1.0/ https://creativecommons.org/publicdomain/zero/1.0/legalcode These data were produced by NOAA and are in the public domain within the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal Public Domain Dedication (CC0). NOAA The survey area is located south of Provincetown, MA, and to the west of the Cape Cod Peninsula. The inshore limit of the survey area was the charted 12 foot contour, or the inshore Navigable Area Limit Line (NALL), defined by 3.5 meters or the limit of safe navigation. The survey covers approximately 6.7 square nautical miles. 42.054629 70.226401 41.989794 70.11782199999999 Survey coverage did not fully extend to the survey limits. Wellfleet Harbor and Provincetown Harbor are both in need of a modern hydrographic surveys. The charted data in these areas are from 1933. In Wellfleet Harbor, the USCG and the harbormaster have both requested a survey due to vessels running aground and the new data updating the charts. Also, the data from this survey will help the USCG with the placement of aids to navigation. Survey data from this project is intended to supersede all prior survey data in the common area. The entire survey is adequate to supersede previous data. The Grid QC tool within QC Tools was used to analyze multibeam echosounder (MBES) data density. The MBES surface meets the HSSD data density requirement. Pydro derived histogram plot showing HSSD complete coverage compliance of H13793 MBES data within the CUBE VR surface. file:///M:/SA928NRTNL23/Surveys/H13793/01_HDR/Working/Report/Field/DR_Images/H13793_MB_VR_MLLW_Final.GQv6.density.png All waters in survey area Complete Coverage (Refer to HSSD Section 5.2.2.3) Survey coverage was in accordance with the requirements listed above and in the HSSD with some exceptions. Pydro Explorer's Flier Finder found 56 fliers within the H13793 VR surface. These fliers were investigated and found to not be real. Pydro Explorer's Holiday Finder found 6 holidays, which were all small in size and within waters deeper than 18m, and do not appear to contain any navigationally significant features. Pydro Explorer's VALSOU Checks tool also flags one feature, however, the VALSOU of the feature and the VALSOU of the finalized surface are the same, so the feature should not be flagged. Survey coverage of H13793. file:///M:/SA928NRTNL23/Surveys/H13793/01_HDR/Working/Report/Field/DR_Images/Provincetown_Overview.png S3007 0.0 318.8 0.0 0.0 0.0 0.0 0.0 5.08 0.0 0.0 318.8 0.0 0.0 0.0 0.0 0.0 5.08 0.0 1.59 0 0 0 0 6.68 2023-09-27 2023-09-28 2023-09-29 2023-09-30 2023-10-01 2023-10-02 Refer 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. S3007 10.38 0.6 MBES Kongsberg Maritime EM 2040C Conductivity, Temperature, and Depth Sensor YSI CastAway-CTD Sound Speed System AML Oceanographic Micro SV-Xchange Positioning and Attitude System Applanix POS MV 320 v5 Multibeam crosslines acquired for this survey totaled 1.59% of mainscheme acquisition. A 4m CUBE surface was created using only mainscheme lines and a second 4m CUBE surface was created using only crosslines. These surfaces were then input into the Pydro Tool "Compare Grids". The comparison passed HSSD specifications. Pydro generated graph showing comparison between mainscheme and crosslines in H13793. file:///M:/SA928NRTNL23/Surveys/H13793/01_HDR/Working/Report/Field/DR_Images/MS_4m-XLs_4m_fracAllowErr_Freq.png Pydro generated graph showing comparison between mainscheme and crosslines in H13793. file:///M:/SA928NRTNL23/Surveys/H13793/01_HDR/Working/Report/Field/DR_Images/MS_4m-XLs_4m_depth_delta.png ERS via VDATUM 0.0 0.129 S3007 2 0 0 0.2 Total Propagated Uncertainty (TPU) values for H13793 were derived from a combination of fixed values for equipment and vessel characteristics, as well as field assigned values for sound speed uncertainties. The uncertainty for the VDatum model was provided to the field units in the Project Instructions. This value (0.129m) within CARIS is found under the "GPS Sounding Datum" field, and not within the "Zoning" field as listed above. A visual inspection of the Uncertainty layer revealed the areas of higher uncertainty occur in the outer beams, and a visual inspection of the Density layer revealed the areas of lowest density are in the deepest areas of the survey. In addition to the usual a priori estimates of uncertainty, some real time and post processed uncertainty sources were also incorporated into the depth estimates of the survey. Real-time uncertainties from the Kongsberg MBES sonars were incorporated and applied during post processing. Uncertainties associated with vessel roll, pitch, gyro, navigation, and heave were applied during post-processing. All of the aforementioned uncertainties were applied in CARIS. As stated, H13793 is an ellipsoidally referenced survey (ERS) and the tidal component was accomplished with a separation model. Pydro generated graph showing compliance of uncertainty standards for H13793. file:///M:/SA928NRTNL23/Surveys/H13793/01_HDR/Working/Report/Field/DR_Images/H13793_MB_VR_MLLW_Final.GQv6.tvu_qc.png Pydro generated graph showing compliance of resolution requirements for H13793. file:///M:/SA928NRTNL23/Surveys/H13793/01_HDR/Working/Report/Field/DR_Images/H13793_MB_VR_MLLW_Final.GQv6.pct_res.full_cov.png Sonar system quality control checks were conducted as detailed in the quality control section of the DAPR. Error Reading Profile 5250 from Process Depths of Line Line 0117 creates an error message when any nodes are changed that states "Error Reading Profile 5250 from Process Depths of Line". Besides the error message, the line appears to be working correctly. None Exist There were no other factors that affected corrections to soundings. At least once every 4 hours. SVP casts were taken at least once every four hours in the deepest water nearest to the survey area being worked on. The SVP casts were applied to the MBES lines in CARIS using the "nearest in distance within time of 4 hours" method. 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. All equipment and survey methods were used as detailed in the DAPR. NOAA Profile Version 2022 H13793_MB_VR_MLLW CARIS VR Surface (CUBE) Variable Resolution -0.238 43.135 NOAA_VR Complete MBES H13793_MB_VR_MLLW_Final CARIS VR Surface (CUBE) Variable Resolution -0.238 43.135 NOAA_VR Complete MBES Additional information discussing the vertical or horizontal control for this survey can be found in the accompanying HVCR. Mean Lower Low Water ERS via VDATUM S-A928_VDatum_100m_NAD83-MLLW_geoid12b North American Datum 1983 Projected UTM 19 RTX The Wide Area Augmentation System (WAAS) was used for real-time horizontal control during data acquisition. US5MA1KP 20000 1 2022-08-24 2022-08-24 US5MA1KQ 20000 1 2022-08-24 2022-08-24 US5MA1LP 20000 1 2022-08-24 2022-08-24 US5MA1LQ 20000 1 2022-08-24 2022-08-24 US5MA1LR 20000 1 2022-08-24 2022-08-24 Due south of Provincetown Harbor is Long Point. This point is correctly charted, and no Danger to Navigation Reports were submitted for this survey. All charted features are discussed in the FFF. Charted soundings and H13793 soundings generally agree in value. Some uncharted features do exist and are discussed further within the FFF. No channels exist within the survey limits. All ATONs were found to be on station and serving their intended purpose. No Maritime Boundary Points were assigned for this survey. No bottom samples were required for this survey. No overhead features exist for this survey. No submarine features exist for this survey. No platforms exist for this survey. Ferry routes and/or terminals exist for this survey, but were not investigated. No abnormal seafloor or environmental conditions exist for this survey. No present or planned construction or dredging exist within the survey limits. No new surveys or further investigations are recommended for this area. No new ENC scales are recommended for this area. 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 meets or exceeds requirements as set forth in the NOS Hydrographic Surveys Specifications and Deliverables, Field Procedures Manual, 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. LTJG Mark Meadows Chief of Party 2024-01-25 PST Michael Bloom Sheet Manager 2024-01-25