OPR-P183-RA-12Shumagin Islands, AKShumagin IslandsNOAA Ship RAINIERH124743 Northeast of Simeonof IslandAlaskaUnited States400002012Richard T. Brennan, CDR/NOAANavigable Area2012-05-162012-08-262012-09-30Multibeam Echo SounderMultibeam Echo Sounder BackscattermetersMean Lower Low WaterfathomsMean Lower Low WaterNorth American Datum of 1983 (NAD83)UTCPacific Hydrographic BranchThe project area is referred to as Sheet 3: "Northeast Simeonof Island" within the Project Instructions. The area is directly northeast of Simeonof Island in the Shumagin Islands and includes areas landward and seaward of the Three Nautical Mile Line. The northeastern most limit is approximately 5.8 nautical miles from Simeonof Island (Figure 1).55.0085159.09354.9161666667159.3001666671Area surveyed (Chart 16540).file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_area_surveyed.jpgThe purpose of this survey is to update existing NOS nautical charts. The project includes critical areas in the Shumigin Islands.The entire survey is adequate to supersede previous data.Data acquired on survey H12474 met complete multibeam echosounder (MBES) coverage requirements, including the 5 soundings per node data density requirements outlined in section 5.2.2.2 of the HSSDM (Figure 2). In order to extract some descriptive statistics of the data density achievements, the density layer of each finalized surface was queried within CARIS and then examined in Excel (Figure 3). Overall, the required data density was achieved in 99.8% of the nodes.2Sounding density plot for survey H12474. Areas highlighted in green contain at least the requisite 5 soundings per node, whereas the red areas have a data density of 4 soundings or fewer per node. 99.8% of nodes were populated with 5 soundings or greater per node. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Density_ColorRange.jpg3Summary table showing the percentage of nodes satisfying the 5 sounding density requirements, sub-divided by the appropriate depth ranges. Note: The final row has a unit of square meters, and sums the number of different resolution nodes into a common unit of area.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Density_stats_table.jpgSurvey limits were met in accordance with the requirements in the Project Instructions and the Hydrographic Survey Specifications and Deliverables Manual (HSSDM).4Survey H12474 is located in the northeast vicinity of Simeonof Island of the Shumagin Islands, Alaska.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_survey_area_zoomed_out.jpgComplete MBES coverage was achieved in the assigned survey area (Figure 4) except for a small acoustic shadow near a least depth of 11 meters (Figure 5) and an inshore area foul with kelp (Figure 6). The kelp area was nearshore, dangerous to approach and determined to be non-navigationally significant. The kelp area is delineated and attributed in the Final Feature File.5H12474 survey coverage. Small gap in coverage (due to acoustic shadowing) is highlighted off the northern point of Simeonof Island.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Coverage_with%20holiday%20inset.jpg6Survey coverage only differed from assigned sheet limits near one inshore area foul with kelp.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/Kelp%20area.jpg2012-08-262012-08-282012-08-292012-09-092012-09-102012-09-122012-09-132012-09-3050026.51S221063.700000002801 (RA-4)054.500000002802 (RA-5)099.5000005.102803 (RA-3)058.400000002804 (RA-6)052.20000016.000328.30000021.106.4Shoreline was investigated in accordance with the Project Instructions and the HSSDM.Bottom samples were acquired in accordance with the Project Instructions and the HSSDM. Six proposed bottom sample locations were included in the Project Reference File, however only five bottom samples were collected for survey H12474. The remaining location did not produce a sample after three attempts and was labeled 'unknown'. All samples were labeled in accordance with the HSSDM with S-57 attribution and can be found in the Final Feature File (Figure 7).7Bottom sample locations.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Bottom_Sample_locations.jpg 2801 (RA-4)283.52802 (RA-5)283.52803 (RA-3)283.52804 (RA-6)283.5S22123116.5KongsbergEM710MBESResonSVP 71Sound Speed SystemResonSVP 70Sound Speed SystemResonSeaBat 7125MBESApplanix POS-MV V4Positioning and Attitude SystemSeaBird ElectronicsSBE 19Conductivity, Temperature and Depth SensorSeaBird Electronics SBE 19 plusConductivity, Temperature and Depth SensorOdim Brooke Ocean (Rolls Royce Groups)MVP200Conductivity, Temperature and Depth SensorOdim Brooke Ocean (Rolls Royce Groups)MVP30Conductivity, Temperature and Depth SensorMultibeam crosslines were acquired using the Reson 7125 on vessel 2802 (RA-5) and 2804 (RA-6) totaling 21.1 nautical miles, comprising 6.4% of mainscheme MBES. Separate 4-meter surfaces of the mainscheme and crosslines were created, from which a difference surface was generated in CARIS HIPS and SIPS (Figure 8). Statistics were then derived from the difference surface and examined in Excel (Figure 9). The mean difference between depths derived from the mainscheme and crosslines is -0.02 meters with the mainscheme being the shoaler of the two; the standard deviation is 0.15 meters. 8Crossline and mainscheme difference surface (in meters) and mainscheme tracklines. Mean: -0.02 meters Std. Dev: 0.15 meters.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_MS%20and%20XL.jpg9Difference surface histogram for mainscheme and crosslines (mainscheme shoaler). file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_XL_MS_Stats.jpg00.065S2211.0 0.05 28013.0 0.15 28023.0 0.15 28033.0 0.15 28043.0 3.0 0.15 Uncertainty values of submitted, finalized grids were calculated in CARIS using the "Greater of the Two" method among uncertainty and standard deviation (scaled to 95%). To visualize the locations in which accuracy requirements were met for each finalized surface, a custom "IHOness" layer was created in CARIS, based on the difference between calculated uncertainty of the nodes and the allowable IHO uncertainty (Figure 10). To quantify the extent to which accuracy requirements were met, the preceding "IHOness" layers were queried within CARIS and then examined in Excel (Figure 11). Overall, 100.0% of survey H12474 met the accuracy requirements stated in the HSSDM. 10Survey overview indicating areas in which IHO accuracy standards were met (in green).file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_IHOness_layer.jpg11Summary table showing the percentage of nodes satisfying the indicated IHO accuracy level, sub-divided by the appropriate depth ranges. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_IHOness_layer_table2.jpgH12474 junctions with two concurrent RAINIER MBES surveys from the same project (OPR-P183-RA-12) and one Fugro LADS lidar survey from 2009 (Figures 12). Junction comparisons were performed using CARIS difference surfaces, tool tip, and Subset Editor. H12472400002012NOAA Ship RAINIERWThe junction with RAINIER survey H12472 is along the western edge of survey H12474. On average, there was 5200 by 200 meters of overlap between H12474 and H12472 (Figure 13). A CARIS difference surface was created using the 4-meter surface from both surveys, yielding a mean difference of -0.07 meters (H12474 shoaler) with a standard deviation of 0.14 meters (Figure 14). In addition, inspection of the data in CARIS Subset Editor showed agreement between the two surveys (Figure 15).12Junction survey overview (Chart 16540).file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Junctions_all.jpg13Difference surface (in meters) of junction between western extent of H12474 and the eastern extent of H12472. The average difference was -0.07 meters.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Junction_H12472_overlapping.jpg14Difference surface statistics between junction of H12474 and H12472. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Junction_H12472_stats.jpg15Subset of multibeam data between junction of H12474 and H12472. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12472_subset.jpgH12475400002012NOAA Ship RAINIERSThe junction with RAINIER survey H12475 is along the southern edge of survey H12474 (Figure 16). A CARIS difference surface was created using the 4-meter surface from both surveys, yielding a mean difference of -0.03 meters (H12474 shoaler) with a standard deviation of 0.21 meters (Figure 17). On average, there was 200 by 5200 meters of overlap between H12474 and H12475. In addition, inspection of the data in CARIS Subset Editor showed agreement between the two surveys (Figure 18).16Difference surface (in meters) of junction between southern extent of H12474 and the northern extent of H12475. The average difference was -0.03 meters.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Junction_H12475_overlapping.jpg17Difference surface statistics between junction of H12474 and H12475. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Junction_H12475_stats.jpg18Subset of multibeam data between junction of H12474 and H12475. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12475_subset.jpgH12104100002009Fugro LADSSWThe junction with lidar survey H12104 is along the southwestern edge of survey H12474 (Figure 19). In accordance with the H12104 Descriptive Report, the lidar shoal layer was used for the depth comparison. A CARIS difference surface was created using the depth layer from the 4-meter surface of H12474 and the shoal layer of the 5-meter surface of H12104 (Figure 20), yielding a mean difference of -0.04 meters (H12104 shoaler) with a standard deviation of 0.49 meters (Figure 21).19Lidar junction survey overview.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_lidar_Junction.jpg20Difference surface (in meters) of junction between southwestern extent of H12474 and the northeastern extent of H12104. The average difference was -0.04 meters.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_LIDAR_DifferenceSurface.jpg21Difference surface statistics between junction of H12474 and H12104.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_LI_Stats.jpgSonar system quality control checks were conducted as detailed in the quality control section of the DAPR. Kongsberg EM710 Data ArtifactDuring the 2012 Hydrographic Survey Readiness Review, an artifact was identified in bathymetric data acquired with the RAINIER's Kongsberg EM710. This heave-like artifact amplifies with vessel dynamics; in particular, as the magnitude of the ship's pitch and heave increases (e.g. in heavy weather), so too does the magnitude of the depth errors. Figure 22 shows an overhead view of two survey lines acquired in similar depths (~90 meters) on different days during acquisition of a previous survey. On the left, data was acquired in a more dynamic regime (8 foot seas), while the right was acquired on a calmer day (4 foot seas) -- both lines are gridded at a 4-meter resolution with equivalent vertical exaggerations. The survey lines of Figure 22 are shown in CARIS subset view in Figure 23. Figure 23 (top) demonstrates the characteristic undulation of the nadir pings of the ship's system, when in heavy seas. By way of contrast, Figure 23 (bottom), acquired in a less dynamic environment, is nearly free of the artifact. While not an absolute rule, every 1-degree of vessel pitch leads to about 0.1 meters of vertical bias. Representatives from Kongsberg, Applanix and CARIS have been contacted with regard to this problem, and ship's personnel are actively investigating a remedy to this issue; however, at the time of this writing, the artifact still persists. Although the artifact was minimal within survey H12474, it nonetheless exists within the data. The examples below are not data from H12474 and are not representative of the overall quality of this particular survey. The artifact seen on survey H12474 had an error on a magnitude of approximately 0.10 meters. To mitigate problems associated with this artifact, ship's acquisition was only conducted in a sea state that was commensurate with minimizing vessel dynamics. It is in the opinion of the Hydrographer that all data acquired by the EM710 for H12474 is adequate to supersede the chart.22Overhead view of two survey lines, acquired on different days, using the Rainier's Kongsberg EM710. Data acquired in heavier seas (left) displayed a characteristic undulation in the gridded seafloor, while calmer days (right) yielded a smoother representation of the bottom. This data is not from survey H12474.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/heave_artifact.jpg23Cross section view of data acquired using the Rainier's Kongsberg EM710, over a smooth seafloor, on both dynamic (top) and calm (bottom) sea states. Notice that with increased vessel dynamics, there is an increased artifact in the processed depths. This data is not from survey H12474.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/heave_artifact2.jpgSound Speed ArtifactsDue to the dynamic nature of the sound speed within the survey area, there are associated artifacts seen within the data. These artifacts are most pronounced in the outer beams, and generally present themselves in the form of a “frown". The CUBE surface generated by CARIS largely ignored the outer beam sound speed refraction and stayed true to the seafloor (Figure 24). All data meets or exceeds accuracy specifications as outlines in the HSSDM. 24Example of sound speed artifact seen in survey H12474.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/SVP_issues2.jpgLarge Sea State During Crossline AcquisitionTwo crosslines were acquired by Launch 2802 as a quality check against the RAINIER's EM710 data. Owing to a large sea state (greater than 5 feet) observed during crossline acquisition, a heave-like artifact was noted in the crossline (Figure 25). At its worse, the artifact measures ±0.25 meters, which is within allowable accuracy tolerances for the given depths. Though of lesser quality, the data was retained given it was major quality check against the EM710. Again, all data meets the specifications as outlined in the HSSDM. 25Example of heave artifact seen in survey H12474.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/motion.jpgSound speed profiles were acquired with the MVP200 (S221) and MVP30 Launch 2804) approximately every 15 minutes with efforts made to distribute the casts throughout the survey area. All other launch sound speed profiles were acquired using the SBE-19 and SBE-19 plus CTDs at discrete locations at least once every four hours. A single sheet-wide concatenated SVP was created and applied to all H12474 survey lines using the "Nearest in distance within (4 hours) Time" profile selection method. A total of 55 SVP casts were used (Figure 26). On DN257, one cast was taken outside of the survey limits. This cast was applied to a single holiday line and it was the only cast acquired that day. There is no apparent sound velocity artifact seen in this data.26Sound speed cast locations for survey H12474.file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/SVP_casts.jpgAll equipment and survey methods were used as detailed in the DAPR.Applanix True Heave correctors are not applied to Kongsberg EM710 multibeam data collected by RAINIER because tests in the field have demonstrated a marked increase in sonar data artifacts discussed in section B.1.1 of the DAPR. The current theory is that CARIS somehow mis-applies True Heave data to Kongsberg SIS data. This problem remains under investigation. On DN259, the 7125 receiver on Launch 2802 failed. The unit was replaced and subsequently re-calibrated. All changes in alignments are incorporated into the CARIS vessel file. All other sounding systems were calibrated as detailed in the DAPR.Multibeam Patch Test2012-09-15Replaced Receiver Backscatter was logged as .7k files for the launches, included in .ALL files for the ship, and submitted directly to NGDC, but are not included with the data submitted to the Branch.NOAA Catalogue Control Version 5.2 and NOAA Profile Product Version 2.0Software programs and versions used for data processing are described in the DAPR.H12474_1mCUBE1083.0NOAA_1mComplete MBESH12474_2mCUBE2083.0NOAA_2mComplete MBESH12474_4mCUBE4083.0NOAA_4mComplete MBESH12474_8mCUBE8083.0NOAA_8mComplete MBESH12474_1m_FinalCUBE1020.0NOAA_1mComplete MBESH12474_2m_FinalCUBE218.040.0NOAA_2mComplete MBESH12474_4m_FinalCUBE436.080.0NOAA_4mComplete MBESH12474_8m_FinalCUBE872.0160.0NOAA_8mComplete MBESH12474_8m_CombinedCUBE8083.0NOAA_8mComplete MBESAdditional information discussing the vertical or horizontal control for this survey can be found in the accompanying HVCR.Mean Lower Low WaterDiscrete ZoningSand Point, AK945-94509459450.tidFinal ApprovedP183RA2012CORP.zdfFinal2012-10-022012-10-18North American Datum of 1983 (NAD83)Single BaseSimeonof Island, AKN/AIn conjunction with this project, a GPS base station was established by RAINIER personnel in the vicinity of Simeonof Harbor near the northwest end of Simeonof Island. Vessel kinematic data (POS files) were post-processed with Applanix POSPac and POSGNSS software using Single Base processing methods described in the DAPR. Kodiak, AK (313 kHz)Cold Bay, AK (289 kHz)165402528300000132012-102012-10-302012-10-27A comparison was made between survey H12474 and Chart 16540 using CARIS CUBE surfaces and a sounding layer. There are three charted depths within the limits of H12474. The charted 22-fathom depth was found to be 24 fathoms. The charted 19-fathom depth was found to be 23 fathoms and the charted 30-fathom depth was found to be 23 fathoms (Figure 27). The Hydrographer recommends that a sounding set derived from survey H12474 supersede charted depths. The charted 10-fathom contour does not agree with the acquired MBES coverage. Surveyed depths from H12474 suggest the contour should be moved shoreward. Data from the junctioning lidar survey (H12104) confirms this assessment (Figure 28). Refer to section D.2 of this report for information regarding shoreline feature investigation. 27Survey data as compared to charted (16540) depths. file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Chart_comparison.jpg28Comparison between charted (16540) 10-fathom contour and depths measured derived from both survey H12474 and junctioning lidar survey (H12104).file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Contour2.jpgUS3AK50M300000172012-06-292012-06-29falseENC US3AK50M was digitized from Chart 16540 and coincides with the raster. The depths and contours on the ENC match the raster, and the comparison between survey H12474 and the ENC is equivalent to the preceding comparison with Chart 16540. The Hydrographer recommends that a sounding set derived from survey H12474 supersede charted depths. No AWOIS items exist for this survey.No charted features that contain the label PA, ED, PD or Rep exist for this survey.No uncharted features exist for this survey.No Danger to Navigation Reports were submitted for this survey.No shoals or potentially hazardous features exist for this survey.No 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. There were 17 assigned features for this survey. All of the assigned features were either inshore of the NALL, or addressed in the Final Feature File (Figure 29).29H12474 shoreline features (those assigned indicated in red).file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Data_to_Submit_DO_NOT_USE/Processed/Multimedia/H12474_Features.jpgNo prior survey comparisons exist for this survey.Aids to navigation (ATONs) do not exist for this survey.Overhead features do not exist for this survey.Submarine features do not exist for this survey.No ferry routes or terminals exist for this survey.No platforms exist for this survey.No significant features exist for this survey.There is no present or planned construction or dredging 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 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. Richard T. Brennan CDR/NOAACommanding Officer, NOAA Ship RAINIER2013-01-10Michael O. Gonsalves LT/NOAAField Operations Officer, NOAA Ship RAINIER2013-01-10James B. JacobsonChief Survey Technician, NOAA Ship RAINIER2013-01-10Rosemary P. Abbitt ENS/NOAAJunior Officer, NOAA Ship RAINIER2013-01-10file:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Request%20for%20Final%20Approved%20Water%20Levels/H12474_Final_Tides_Request.pdffile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Request%20for%20Final%20Approved%20Water%20Levels/H12474_Tides_Request.midfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Request%20for%20Final%20Approved%20Water%20Levels/H12474_Tides_Request.miffile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Request%20for%20Final%20Approved%20Water%20Levels/H12474_Tides_Request.pdffile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Request%20for%20Final%20Approved%20Water%20Levels/H12474_Tides_Request.zipfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Final%20Approved%20Water%20Levels/H12474_Final_Tides.pdffile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/IV%20Tides_and_Water_Levels/Final%20Approved%20Water%20Levels/H12474_Final_Tides_Note.pdffile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/III%20Progress_Sketch-Survey_Outline/H12474_Outline.DATfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/III%20Progress_Sketch-Survey_Outline/H12474_Outline.IDfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/III%20Progress_Sketch-Survey_Outline/H12474_Outline.MAPfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/III%20Progress_Sketch-Survey_Outline/H12474_Outline.TABfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Surveys/H12474/Descriptive_Report/Appendices/V%20%20Supplemental_Correspondence/H12474_Survey_Outline.pdffile:///H:/OPR-P183-RA-12_Shumagin/H12474/Acquisition_Logs/H12474_2801_Acquisition_Log.xlsmfile:///H:/OPR-P183-RA-12_Shumagin/H12474/Acquisition_Logs/H12474_2802_Acquisition_Log.xlsmfile:///H:/OPR-P183-RA-12_Shumagin/H12474/Acquisition_Logs/H12474_2803_Acquisition_Log.xlsmfile:///H:/OPR-P183-RA-12_Shumagin/H12474/Acquisition_Logs/H12474_2804_Acquisition_Log.xlsmfile:///H:/OPR-P183-RA-12_Shumagin/H12474/Acquisition_Logs/H12474_S221_Acquisition_Log.xlsmfile:///I:/SVP/H12474/H12474_Sheetwide_Concat.svpfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Project%20Instructions/Final_OPR-P183-RA-12_Shumigan_Islands_AK_%20Instructions.xmlfile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Project%20Instructions/Final_OPR-P183-RA-12_ShumiganIslandsAK_Instructions_revised_signed_MOCP_cdlWJB.pdffile:///K:/Projects/2012_Projects/OPR-P183-RA-12,%20Shumagin%20Is/Project%20Instructions/Final_OPR-P183-RA-12_ShumiganIslands_AK_Instructions.pdf