OPR-I369-TJ-18San Juan and Ponce and Vicinities, Puerto RicoSan Juan and Ponce and VicinitiesNOAA Ship THOMAS JEFFERSONH131412Bahia de GuayanillaPuerto RicoUnited States50002018Christiaan van Westendorp, CAPT/NOAANavigable Area2018-06-152018-08-202018-11-03Multibeam Echo SounderMultibeam Echo Sounder BackscattermetersUniversal Transverse Mercator (UTM)UTCAtlantic Hydrographic BranchAny 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.NOAASurvey H13141, located in the Bahia de Guayanilla and surrounding area, was conducted in accordance with coverage requirements set forth in the Project Instructions OPR-I369-TJ-18.17.99307166.78815117.95520766.733948Survey layout for H13141, plotted over RNC 25681_1. Orange outline represents the survey limits set forth by the Project Instructions.SupportFiles\Survey_limits.jpgSurvey data were acquired in accordance with the requirements set forth by the Project Instructions (PI) and the Hydrographic Surveys Specifications and Deliverables (HSSD) dated April 2018. However, some areas were not surveyed to the Navigable Area Limit Line (NALL) because the conditions within those areas were deemed too dangerous for survey operations (Figure 2).An example of an area in which the NALL was not able to be reached due to the conditions in which survey operations were being conducted. Within this specific graphic, the areas marked by a purple box are the areas in which the NALL was met.SupportFiles\Survey_limit_restriction.jpgThe economy for the 3.3 million Americans in the territory of Puerto Rico is largely ocean dependent. Approximately 7% of the jobs in Puerto Rico are directly involved in ocean related services accounting for over $920 million in wages. The island also imports 85% of its foodstuffs and virtually all of its energy products. Currently, only a small percentage of its coasts and critical harbors have been surveyed with modern, high-resolution sounding or hydrographic LiDAR devices. In 2017 the island was damaged by two major hurricanes; in response, the NOAA ship Thomas Jefferson conducted emergency sidescan and multibeam surveys of seven port facilities to locate storm related obstructions and damage to the channels. A follow up to some of these ports and pilot areas, combined with a survey of the surrounding coastline, is necessary to verify that dangerous obstructions have been removed prior to updating nautical charts.The entire survey is adequate to supersede previous data.All waters in survey areaObject Detection Coverage (Refer to HSSD Section 5.2.2.2)Survey coverage was in accordance with the requirements listed above and in the HSSD (2018).29030257.66000001.6029040205.560000017.6100463.220000019.2104.15110004.92018-08-202018-08-212018-08-222018-08-232018-08-242018-08-252018-08-262018-08-282018-08-292018-09-072018-11-03Refer 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. Deviations from the DAPR are discussed in the following sections.29038.51.229048.51.2Kongsberg MaritimeEM 2040MBESTeledyne RESONSVP 70Sound Speed SensorTeledyne RESONSVP 71Sound Speed SensorApplanixPOS MV 320 v5Positioning and Attitude SystemSea-Bird ScientificSBE 19plus V2Conductivity, Temperature, and Depth SensorHSL 2903 and 2904 collected 19.21 linear nautical miles of MBES crosslines and, or 4.15% of mainscheme MBES data. A variable resolution (VR) Combined Uncertainty and Bathymetry Estimator (CUBE) surface of mainscheme data and a VR CUBE surface of crossline data were differenced - the resulting mean was -0.02 with a standard deviation of 0.12 (Figure 3). Visual inspection of the difference surface indicated no systematic issues.H13141 crossline/mainscheme comparison.SupportFiles\XL_comparison.jpg0.00.12ERS via VDATUM290340.2290440.2The bathymetric surface's uncertainty layer is compliant with HSSD 2018 uncertainty standards. Over 99.5% of all nodes pass uncertainty standards (Figure 4).H13141 uncertainty standards.SupportFiles\H13141_MB_VR_MLLW_Final.QAv5.tvu_qc.pngThere are two contemporary surveys that junction with survey H13141 (Figure 5).Survey H13141 MBES data outlined in orange in order to show overlapping data with junction surveys, plotted over RNC 25681.SupportFiles\Junction overview.jpgH1314350002018NOAA Ship THOMAS JEFFERSONSEThe east side of Survey H13141 junctioned with Survey H13143 (Figure 6). A difference surface comparison was conducted in accordance with procedures outlined in the DAPR. The mean difference between bathymetric surface nodes was -0.02m with a standard deviation of 0.06m. Statistics and visual inspection indicate that surveys H13141 and H13143 are in general agreement (Figure 7). Survey H13141 MBES data outlined in orange in order to show overlapping data with junction survey H13143, plotted over RNC 25681.SupportFiles\DR_b2_Junction H13143.jpgH13141 and H13143 surface difference comparison statistics.SupportFiles\DR_b2_Junction H13143_stats.jpgW00468200002018NOAA Ship NANCY FOSTERSThe south side of Survey H13141 junctioned with Survey W00468 (Figure 8). A difference surface comparison was conducted in accordance with procedures outlined in the DAPR using the H13141 Final VR CUBE surface and a geotiff of a VR surface provided to the field by the Project Manager. The mean difference between bathymetric surface nodes was 1.18m with a standard deviation of 2.26m (Figure 9). The range of differences was -21.850m to 27.928m. Significant differences between surface nodes were located in areas covering a steep shelf running along the southern boundary of sheet H13141 or over highly dynamic areas of the sea floor. Surface differences over relatively flat areas were generally less than one meter in magnitude.Survey H13141 MBES data outlined in orange in order to show overlapping data with junction survey W00468, plotted over RNC 25681.SupportFiles\DR_b2_W00468_Junction.jpgH13141 and W00468 surface difference comparison statistics.SupportFiles\DR_b2_W00468_Junction_stats.jpgSonar system quality control checks were conducted as detailed in the quality control section of the DAPR.None ExistThere were no conditions or deficiencies that affected equipment operational effectiveness.None ExistThere were no other factors that affected corrections to soundings.Casts were conducted at the start of acquisition each day and within four hours of each previous cast. Cast locations were selected to sample water most representative of local environmental survey conditions (Figure 10).SVP cast distribution.SupportFiles\SVP_casts.jpgHSL 2903 and 2904 acquired 100% MBES data to meet object detection coverage requirements on survey H13141, as specified in the project instructions, using Kongsberg EM2040's.All data reduction procedures conform to those detailed in the DAPR with the exception of line 0056_20180823_165540_2904_EM2040 of day 2018-235. Efforts to apply Delayed Heave to line 0056_20180823_165540_2904_EM2040 of day 2018-235 were not successful. Realtime Heave was used to correct for heave motion for line 0056_20180823_165540_2904_EM2040. Marinestar positioning data was used to remedy bad RTX positional data. See section C.2 for more detailed information.Artifact present in data using Trimble RTX trajectory data (left) not present in data using Marinestar Precise Point Positioning (PPP) trajectory data (right).SupportFiles\Marinestar offset.jpgAll sounding systems were calibrated as detailed in the DAPR.Raw MBES backscatter was logged as part of the .all file of the Kongsberg EM2040 systems. Backscatter was processed in QPS Fledermaus GeoCoder Toolbox (FMGT) software, and the exported geotiff's are included in the final processed data package (Figures 12-16).HSL 2903's 300kHz multibeam acoustic backscatter at 1m resolution.SupportFiles\DR_b4_Backscatter_2903_300kHz.jpgHSL 2903's 200kHz multibeam acoustic backscatter at 1m resolution.SupportFiles\DR_b4_Backscatter_2903_200kHz.jpgHSL 2904's 300kHz multibeam acoustic backscatter at 1m resolution.SupportFiles\DR_b4_Backscatter_2904_300kHz.jpgHSL 2904's 200kHz multibeam acoustic backscatter at 1m resolution.SupportFiles\DR_b4_Backscatter_2904_200kHz.jpgCombined multibeam acoustic backscatter at 1m resolution.SupportFiles\DR_b4_Backscatter_combined.jpgNOAA Profile Version 5.8H13141_MB_VR_MLLWCARIS VR Surface (CUBE)Variable Resolution1.277241.698NOAA_VRObject DetectionH13141_MB_VR_MLLW_FinalCARIS VR Surface (CUBE)Variable Resolution1.277241.698NOAA_VRObject DetectionH13141_MBAB_1m_TJ2903_300kHz_1of4MB Backscatter Mosaic Geotiff1N/AObject DetectionH13141_MBAB_1m_TJ2904_300kHz_2of4MB Backscatter Mosaic Geotiff1N/AObject DetectionH13141_MBAB_1m_TJ2903_200kHz_3of4MB Backscatter Mosaic Geotiff1N/AObject DetectionH13141_MBAB_1m_TJ2904_200kHz_4of4MB Backscatter Mosaic Geotiff1N/AObject DetectionObject Detection coverage requirements were met by 100% Object Detection multibeam coverage as specified under section 5.2.2.1 of the HSSD (2018). All bathymetric grids for H13141 meet density requirements per the HSSD 2018 (Figure 17).H13141 data density standards.SupportFiles\H13141_MB_VR_MLLW_Final.QAv5.density.pngNo Horizontal and Vertical Control Report (HVCR) is required for this survey.Mean Lower Low WaterERS via VDATUMVDatum-WGS84_ACHARE_Polygon_ACHARE_Polygon_xyWGS84-MLLW_geoid12b.csarNorth American Datum of 1983 (NAD 83). Survey H13141 data were acquired in the World Geodetic System of 1984 (WGS 84). Processing and product creation were completed in North American Datum of 1983 (NAD 83)UTM 19NTrimble-RTX service was used with an Applanix POS MVv5 GNSS-INS system to obtain highly accurate ellipsoidally referenced position data to meet ERS specifications for H13141 MBES data, except for line 0334_20180822_210651_2903 of day 2018-234_b. The Fugro Marinestar G2 real-time precise point positioning service was used for line 0334_20180822_210651_2903 of day 2018-234_b to meet ERS specifications for GNSS positioning.A chart comparison was conducted between survey H13141 soundings and previously charted ENC soundings using procedures outlined in the DAPR.US5PR44M10000102016-02-292016-02-29falseThere were a total of three soundings determined by the hydrographer to be considered significantly shoaler than charted soundings and were submitted as a Danger to Navigation (DtoN) report. Reference the relevant DtoN Report documents for further information. Depth contours were compared between H13141 and ENC US5PR44M at depths specified within the ENC (Figures 18-21). The hydrographer recommends contours for ENC US5PR44M be reviewed and updated.Field created contours within the Bahia de Guayanilla shown in orange, plotted over ENC US5PR44M. Soundings shown are ENC soundings.SupportFiles\DR_d1_Bahia Guayanilla contours.jpgField created contours within the Bahia de Tallaboa shown in orange, plotted over ENC US5PR44M. Soundings shown are ENC soundings.SupportFiles\DR_d1_29ft contour_1.jpgField created contours within the Bahia de Tallaboa shown in orange, plotted over ENC US5PR44M. Soundings shown are ENC soundings.SupportFiles\11ft contour.jpgField created contours within the Bahia de Tallaboa shown in orange, plotted over ENC US5PR44M. Soundings shown are ENC soundings.SupportFiles\DR_d1_17ft Contour_1.jpgNo Maritime Boundary Points were assigned for this survey.A total of 146 charted features were investigated. 17 features were deemed appropriate for updating, 48 features were deemed appropriate for deletion, and 81 features were deemed appropriate to be retained as charted. 12 of the features selected to be updated are obstruction areas which indicate Guayanilla's reef shelfs, however, these features were not fully investigated due to being inshore of the Navigable Area Limit Line (NALL). Reference the Final Feature File for further information.18 uncharted features were identified and investigated. Two of the uncharted features were considered dangerous to navigation (see D.1.5). One feature is a Hulk, one feature is a wreck, and the remaining 14 of the features that were not deemed DtoNs are obstructions. Reference the Final Feature File for further information.18JUN07150723-S3DS_R1C1-058266093010_01_P001.TIFDigitalGlobe, Inc2018-06-0718JUN07150723-S3DS_R1C2-058266093010_01_P001.TIFDigitalGlobe, Inc2018-06-07Two obstructions and three shoal soundings were deemed dangers to navigation (DtoNs). Reference the Final Feature File and relevant DtoN Report documents for further information.A comparison between the soundings of H13141 and two charted channel areas located within the Bahia de Tallaboa was conducted. Significant differences exist (up to 12 feet shoaler than charted) between the observed and charted depths (Figures 22-23). These differences were not submitted as DtoNs due to confirmation from the local pilots that these areas are not used by vessels that would be impacted by the observed differences.Channel depth area for the main pier of Bahia de Tallaboa.SupportFiles\Dredge area1.jpgChannel depth area for outdated channel within Bahia de Tallaboa.SupportFiles\Dredge area2.jpgThe number and distribution of bottom samples were adjusted from the sample plan provided by the Project Manager after an analysis of preliminary backscatter mosaics. 11 bottom samples were collected by HSL 2904. The revised sample plan was designed to cover the distinct bottom types within the survey sheet limits (Figure 24). Reference the Final Feature File for further information.H13141 revised bottom sample plan plotted over H13141 backscatter data.SupportFiles\Bottom sample locations.jpgShoreline was not assigned in the Hydrographic Survey Project Instructions or Statement of Work.No prior survey comparisons exist for this survey.61 aids to navigation (AtoN) were investigated while conducting survey H13141. Six AtoNs were off station. AtoN Discrepancy Reports were submitted to the Coast Guard Navigation Center in accordance with HSSD requirements. A Coast Guard buoy tender was in the vicinity of Bahia de Guayanilla and Tallaboa servicing AtoNs while survey H13141 was in progress. Reference the Final Feature File and relevant AtoN Discrepancy Report documents for further information.No overhead features exist for this survey.Two charted submarine pipelines were present within the survey area. One pipeline was exposed and reported to BSEE in accordance with the HSSD 2018 (Figure 25). Reference the Final Feature File and Survey Correspondence documents for further information.H13141 exposed pipeline.SupportFiles\Exposed pipeline.jpgA total of three offshore platforms were located within the survey limits of H13141. Offshore platforms are positioned accurately. Reference the Final Feature File for further information.No ferry routes or terminals exist for this survey.No abnormal seafloor and/or environmental conditions exist for this survey.No present or planned construction or dredging are known to exist within the survey limits.No new surveys or further investigations are recommended for this area.No new insets 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.CAPT Christiaan van Westendorp, NOAACommanding Officer / Chief of Party2019-04-01LT Charles J. Wisotzkey, NOAAField Operations Officer2019-04-01Joshua HiteshewChief Hydrographic Survey Technician2019-04-01