Descriptive Report to Accompany Hydrographic Survey H11004

NOAA FORM 76-35A

U.S. DEPARTMENT OF COMMERCENATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

NATIONAL OCEAN SERVICE

DESCRIPTIVE REPORT

Type of Survey HYDROGRAPHIC

Field No. RA-10-04-04

Registry No. H-11115

LOCALITY

State Alaska

General Locality Approaches to Sitka

Sublocality Olga Strait and Nakwasina Passage

2004

CHIEF OF PARTY CDR John W. Humphrey, NOAA

LIBRARY & ARCHIVES

DATE

NOAA FORM 77-28 U.S. DEPARTMENT OF COMMERCE REGISTER NO.(11-72) NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION

HYDROGRAPHIC TITLE SHEETH11115

NSTRUCTIONS The hydrographic sheet should be accompanied by this form, FIELD NO.

filled in as completely as possible, when the sheet is forwarded to the office. RA-10-04-04

State Alaska

General Locality Approaches to Sitka

Sublocality Olga Strait and Nakwasina Passage

Scale 1:10,000 Date of Survey 4/24/2004 - 5/27/2004

Instructions Date 3/30/2004 Project No. OPR-O112-RA-04

Vessel NOAA Ship launches 1006, 1016, 1101, 1103, 817

Chief of Party CDR John W. Humphrey, NOAA

Surveyed by RAINIER Personnel

Soundings taken by echo sounder Knudsen 320M, Reson SeaBat 8125, Seabeam/Elac 1180

Graphic record scaled by RAINIER Personnel

Graphic record checked by RAINIER Personnel

Evaluation by R. Davies Automated plot by HP Designjet 1050C

Verification by R. Davies, E. Domingo

Soundings in Fathoms and tenths at MLLW

REMARKS: Time in UTC. UTM Projection Zone 8

Revisions and annotations appearing as endnotes were

generated during office processing.

All separates are filed with the hydrographic data.

As a result, page numbering may be interrupted or non-sequential

NOAA FORM 77-28 SUPERSEDES FORM C&GS-537 U.S. GOVERNMENT PRINTING OFFICE: 1986 - 652-007/41215

Descriptive Report to Accompany Hydrographic Survey H11115

Project OPR-O112-RA-04 Approaches to Sitka, AK

Scale 1:10,000 April – May 2004

NOAA Ship RAINIER Chief of Party: Commander John W. Humphrey, NOAA

A. AREA SURVEYED This hydrographic survey was completed as specified by Hydrographic Survey Letter Instructions OPR-O112-RA-04, dated March 31, 2004, Draft Standing Project Instructions dated March 23, 2004, and NOS Hydrographic Specifications and Deliverables dated March 2003. The survey area is Olga Strait and Nakwasina Passage, Alaska. This survey corresponds to sheet “K” in the sheet layout provided with the Letter Instructions. One hundred percent shallow-water multibeam (SWMB) coverage was obtained in the survey area in waters 8 meters and deeper. In 4-8 meters of water 100% SWMB coverage was obtained as much as possible and to acquire least depths over significant features or shoals, as appropriate for this survey. Vertical-beam echo sounder (VBES) data were acquired in depths from 4 to 20 meters to define the four-meter curve and to aid in the planning of SWMB data acquisition. 1 Data acquisition was conducted from April 24 to May 27, 2004 (DN 115 to 148).

Figure 1. H11115 Survey Limits and Junctions

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OPR-O112-RA-04 H11115 April-May 2004

B. DATA ACQUISTION AND PROCESSING A complete description of data acquisition and processing systems, survey vessels, quality control procedures and data processing methods can be found in the OPR-O112-RA-04 Data Acquisition and Processing Report (DAPR), submitted under separate cover.2 Items specific to this survey, and any deviations from the aforementioned report are discussed in the following sections. B1. Equipment and Vessels Data were acquired by the RAINIER survey launches RA1 (1101), RA2 (1103), RA4 (1016), RA5 (1006) and RA7 (817 Ross 950). Vessels RA2 (1103), RA4 (1016), & RA5 (1006) were used to acquire shallow-water multibeam (SWMB) soundings and sound velocity profiles. Vessels RA1 (1101), RA2 (1103) and RA7 (817 Ross 950) were used to acquire vertical-beam echo soundings (VBES) and detached positions (DPs) for shoreline verification. Vessel RA5 (1006) was also used for ATON non-echosounder DPs and bottom sample collection. No unusual vessel configurations were used for data acquisition. 3 B2. Quality Control Crosslines Vertical Beam Echo Sounder (VBES) crosslines including buffer lines totaled 41.82 nautical miles, comprising 79.36% of mainscheme hydrography. Crosslines generally agreed within 1 meter of mainscheme hydrography. 4

Shallow-Water Multibeam (SWMB) crosslines totaled 13.07 nautical miles, comprising 7.24% of SWMB hydrography. The mainscheme bathymetry was manually compared to the XL nadir beams in CARIS subset mode and agreed well with no significant differences noted.5

A statistical Quality Control Report has been conducted on representative data collected with each system used on this survey and is included in the OPR-O112-RA-04 DAPR. Through manual examination of the data and statistical analysis of data accuracy, standards for this survey have been met. Junctions 6

The following contemporary surveys junction with H11115 (see Figure 1): Registry # Scale Date Junction side H11113 1:10,000 2003 Northwest H11114 1:10,000 2004 West H11116 1:10,000 2004 Northeast H11117 1:10,000 2003 Southeast

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H11118 1:10,000 2004 Southwest Surveys H11112, H11113, H11114 and H11118 junction well with this survey, a cursory comparison indicates differences generally less than one fathom. Surveys H11116 and H11117 junction well with this survey, a cursory comparison indicates differences generally within one fathom. Final comparisons will be made at the Pacific Hydrographic Branch (PHB) after the application of smooth tides. 7

Data Quality Factors During collection of VBES on 26-April-2004 (DN 117), vessel RA2 (1103) in Nakwasina Passage on the north end of the sheet we had periodic DGPS outages, possibly due to poor satellite coverage in the confined space of Nakwasina Passage between high mountain ranges. Several lines were deleted during post processing. On two separate occasions during SWMB data collection, minor depth discrepancies (0.20m) were observed in RA5 SWMB data between adjacent, parallel lines run in opposite directions. This is visible in data near the western entrance to Nakwasina Passage and in Olga Strait on top of the shoals marked by fixed aid, LLN 25075. No specific reason was found for the discrepancy, but the error points to a possible problem with vessel configuration. Extra lines were run in Olga Strait, all going in the same direction. Lines at the west entrance to Nakwasina Passage were deemed sufficient despite the error between adjacent lines. The following screen shot taken from CARIS during subsetting illustrates the problem. 8

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B3. Data Reduction Data reduction procedures for survey H11115 conform to those detailed in the OPR-O112-RA-04 DAPR. C. VERTICAL AND HORIZONTAL CONTROL A summary of horizontal and vertical control for this survey follows. Horizontal Control The horizontal datum for this project is the North American Datum of 1983 (NAD83). Differential GPS (DGPS) was the sole method of positioning. Differential corrections from U.S. Coast Guard beacon at Gustavus (288 kHz) were utilized during this survey. Launch-to-launch DGPS performance checks using U.S. Coast Guard beacon at Annette Island (323 kHz) as the check station were performed in accordance with Section 3.2 of the FPM. Copies of the performance checks are included in the OPR-O112-RA-04 DAPR. Vertical Control The vertical datum for this project is Mean Lower-Low Water (MLLW). The operating National Water Level Observation Network (NWLON) primary tide station at Sitka, AK (945-1600) served as control for datum determination and as the primary source for water level reducers for survey H11115. No secondary gauges were required. All data were reduced to MLLW using unverified observed tides from station Sitka, AK using the tide file 9451600.tid and time and height correctors using the zone corrector file O112RA2004CORP.zdf. The Pacific Hydrographic Branch will apply final approved (smooth) tides to the survey data during final processing.9 A request for delivery of final approved (smooth) tides for survey H11115 was forwarded to N/OPS1 on June 03, 2004. A copy of the request is included in Appendix IV. 10

D. RESULTS AND RECOMMENDATIONS D.1 Automated Wreck and Obstruction Information System (AWOIS) Investigations A total of two (2) AWOIS items were located within the limits of H11115 and investigated during this survey. Investigation methods, results, and charting recommendations have been entered into Pydro and are submitted with the digital data. A Printout of the AWOIS Report, H11115_AWOIS_Report.pdf is included in this report. 11

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D.2 Chart Comparison Survey H11115 was compared with the following charts: 17320 (16th Ed., December 20, 2003, 1:217,828, corrected through NTM 39/03)12

17324 (13th Ed., March 25, 1989, 1:40,000, corrected through NTM 05/04).13

Chart 17320 Depths from survey H11115 were generally in agreement within one fathom. Chart 17324 In general, depths from survey H11115 were in agreement with charted soundings within one fathom. Shoal soundings within 3 fathoms were found in the channel between the southern tip of Eastern Point and the most northerly of the Siginaka Islands, in the entrance to the bay west of Eastern Point, and in the channel approaching Limit Island from the west. On the west edge of survey H11115, charted soundings are accurate, but in many cases shoaler soundings were found. This can be attributed to increased bottom coverage using SWMB methods. 14

Data accuracy standards and bottom coverage requirements have been met and survey data are adequate to supersede charted data in their common areas, with the exceptions listed in this report.15

D.3 Shoreline Shoreline Source Vector photogrammetric projects AK9703A and AK02A were supplied by N/NGS3 in the form of cartographic feature files (CFF). RAINIER conducted limited shoreline verification of the CFF. In the absence of CFF MHW or CFF MLLW, RAINIER personnel digitized the largest scale charts in MapInfo and displayed in HYPACK for field verification. In addition, features shown on the current editions of charts 17324 and 17320 that were not depicted on the shoreline source document were digitized in MapInfo by RAINIER personnel and displayed in Hypack for field verification. Shoreline Verification Limited shoreline verification was conducted near predicted low water in accordance with the Standing Project Instructions and FPM sections 6.1 and 6.2. Detached positions (DPs) taken during shoreline verification were recorded in HYPACK and on DP forms, and processed in Pydro. These indicate revisions to features and features not found on the verified shoreline. In addition, annotations describing shoreline were recorded on hard copy plots of digital shoreline. DP forms are included in Section I of the Separates to be Included with Survey Data.

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A detailed Detached Position and Bottom Sample plot 16 in MapInfo format is provided showing all detached positions and bottom samples with notes relating to each feature. The updated shoreline and features are also depicted on the final sounding plot. Verified CFF shoreline that did not require revision is in MapInfo table H11115_CFF_SHORELINE and shown in black. New MLLW features and changes to the MLLW shoreline, CFF or charted, are displayed in pink on the “H11115_SHORELINE_UPDATES” MapInfo table. Charted shoreline, when used for reference purposes or when source data were not available, is depicted in the MapInfo table “H11115_CHD_SHORELINE.” and displayed in brown. 17

Source Shoreline Changes and New Features CFF rock at position 57°10'17.822"N, 135°27'33.340"W ( 472229.53E , 6336583.34N ) is disproved by 100% SWMB. 18

CFF rock at position 57°10'16.272"N, 135°27'28.883"W ( 472304.07E , 6336534.91N ) is disproved by 100% SWMB. 19

CFF MLLW water is CFF ledge at the following positions: 57°14'30.61" N, 135°31'39.03" W (468157.45 , 6344416.99) 20

57°14'35.28" N, 135°31'35.14" W (468214.14 , 6344559.49) 21

57°15'16.47" N, 135°29'14.12" W (470601.90 , 6345840.65) 22

57°15'20.11" N, 135°29'51.28" W (470001.93 , 6345905.88) 23

57°15'10.58" N, 135°28'42.46" W (471134.78 , 6345643.84) 24

57°15'08.37" N, 135°28'12.43" W (471668.48 , 6345550.18) 25

57°13'47.43" N, 135°30'53.55" W (468912.12 , 6343095.92) 26

57°14'19.37" N, 135°31'54.35" W (467903.77 , 6344084.1) 27

CFF vegetation at position 57°11'13.43" N, 135°28'35.98" W (471721.79 , 6338523.88) was not seen during shoreline verification, however it may grow at a later date. 100 % SWMB was acquired in this area. 28

Charted Features 29

Charted (17320) rock at position 57°14'27.73" N, 135°31'39.03" W (468162.71 , 6344340.58) is CFF reef at position 57°14'43.36" N, 135°31'07.35" W (468709.17 , 6344814.3).30 50% SWMB coverage of charted rock area. VBES buffer line is seaward most extent of CFF reef. This can be attributed to the scale of the chart, which appears to have been positioned the rock offshore. 31

Recommendations The Hydrographer recommends that the shoreline as depicted on the Detached Position and Bottom Sample and final sounding MapInfo digital file supersede and complement shoreline information compiled on the CFF and charts as noted. In addition, field notes made by the Hydrographer, including verification of source features or charted features if no source

6


shoreline was available are submitted in the digital MapInfo file “H11115_SHORELINE_NOTES.” 32

D.4 Dangers to Navigation Two dangers to navigation (DTONs) were found and reported to the Marine Chart Division (MCD) for verification and final submission to the Seventeenth Coast Guard District on June 23, 2004 in the form of a digital XML file “H11115_DTON.xml”. A copy of the preliminary Danger to Navigation file is included with the digital data and a hard copy of the DTON report is included in this report. 33

D.5 Aids to Navigation Survey H11115 included five (5) aids to navigation (ATONs). Each aid to navigation (ATON) was found to be correctly charted and serve its intended purpose. 34

D.6 Miscellaneous Bottom samples were collected and are depicted on the Detached Position and Bottom Sample Plot. 35

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E. APPROVAL As Chief of Party, I have ensured that standard field surveying and processing procedures were followed in producing this survey in accordance with the Hydrographic Manual, Fourth Edition, Hydrographic Survey Guidelines, Field Procedures Manual and the NOS Hydrographic Surveys Specifications and Deliverables, as updated for 2003. The digital data and supporting records have been reviewed by me, are considered complete and adequate for charting purposes, and are approved. All records are forwarded for final review and processing to N/CS34, Pacific Hydrographic Branch. Survey H11115 is complete and adequate to supersede charted soundings 36in their common areas. No additional work is required for this survey. 37

Listed below are supplemental reports submitted separately that contain additional information relevant to this survey: Title Date Sent Office Data Acquisition and Processing Report for OPR-O112-RA-04 11/12/2004 N/CS34 Tides and Water Levels Package for OPR-O112-RA-04 2/9/2005 N/OPS1

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Revisions Compiled During Office processing and Certification 1 Concur 2 Filed with the project data. 3 Concur 4 Concur 5 Concur 6 Concur, the junction with survey H11115 and the above listed surveys are complete. A “Joins” note has been added to the smooth sheets where applicable. 7 Results of the comparison after applications of approved tides are considered good. 8 A review of this survey was completed and it complies with the specifications and requirements set forth in the NOS Hydrographic Surveys Specifications and Deliverables Manual, the Field Procedures Manual and the Standing and Letter Project Instructions 9 Approved tide note dated April 13, 2005 is attached. 10 Filed with the hydrographic records. 11 Concur 12 Chart 17320 was not compared to. This survey is located completely on chart 17324 at a scale of 1:40,000. 13 This survey was compared to the current edition of chart 17324, the 14th Edition, dated Jan 1, 2005. 14 Concur 15 Concur 16 Filed with hydrographic records. 17 Shoreline verification conducted by the hydrographer and portrayed on the detached position plot has been analyzed during office processing and shown on the smooth sheet as warranted. A few minor revisions to the CFF shoreline have been shown in dashed red on the smooth sheet. 18 Concur, remove rock 19 Concur, remove rock 20 Concur 21 Concur 22 Concur 23 Concur 24 Concur 25 Concur 26 Concur 27 Concur 28 Do not concur, the correct location of the kelp symbol on chart 17324 is lat. 57/11/20.2N, long. 135/28/5.7W. Retain kelp symbol as charted. 29 Two features, a submerged rock with a depth of five feet and a submerged rock of 3 feet were not disproved and should be retain as charted at lat. 57/15/14.7N, long. 135/29/17.9W and lat. 57/15/12.7N, long. 135/29/24.1W. A Rk charted at lat. 57/15/12.7N, long. 135/28/9.9W should also be retained as charted 30 Do not concur. 31 Charted rock at lat. 57/14/27.73N, long 135/31/39/03W, is a ledge. The CFF reef at lat. 57/14/43.36N, long. 135/31/7.35W is an islet. Chart areas as shown on the smooth sheet. 32 See endnote 17 33 Concur, no other dangers were found during office processing. 34 The evaluator recommends that MCD use the latest information to chart aids to navigation. 35 Concur, bottom characteristics have been shown on the smooth sheet as positioned by the present survey. 36 insert; and features 37 Concur

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H11115 Shoreline Report

Registry Number: H11115

State: AK

Locality: Sitka

Sub-locality: Olga Strait and Nakwasina Passage

Project Number: OPR-O112-RA-04

Survey Dates: 04/26/2004 - 05/23/2004

Charts Affected

Number Version Date Scale

17324 13th Ed. 03/25/89 1:40000

17320 16th Ed. 12/01/03 1:217828

16016 20th Ed. 11/01/03 1:969756

531 21st Ed. 02/02/02 1:2100000

500 8th Ed. 06/01/03 1:3500000

530 30th Ed. 03/23/02 1:4860700

50 6th Ed. 06/01/03 1:10000000

Features

No.FeatureType

SurveyDepth

SurveyLatitude

SurveyLongitude

AWOISItem

1.1 Wreck -1.37 m 57.22828927° N 135.51433406° W ---

1.2 Sounding -0.43 m 57.22711596° N 135.51488725° W ---

1.3 Sounding -0.41 m 57.25462997° N 135.47448433° W ---

1.4 Sounding 10.16 m 57.17189876° N 135.45669651° W ---

1.5 Sounding 16.68 m 57.17156444° N 135.45920595° W ---

1.6 Sounding 14.20 m 57.17113392° N 135.45796790° W ---

2.1 Shoal 5.62 m 57.21003850° N 135.49603568° W 52935

2.2 Sounding 28.78 m 57.19083187° N 135.46783905° W 52963

3.1 Shoal 3.03 m 57.16953090° N 135.44923448° W ---

3.2 Shoal 2.08 m 57.16846147° N 135.46285965° W ---

Generated by Pydro v5.3.2 on Tue May 09 14:02:22 2006 [UTC]

1 - New Features

1.1) Profile/Beam - 2/1 from H11115 / 817_NonEchosounder_DP / 2004-128/ DP_817_128

Survey Summary

Survey Position: 57.22828927° N, 135.51433406° W

Least Depth: -1.37 m

Timestamp: 2004-128.18:36:20.000 (05/07/2004)

DP Dataset: H11115 / 817_NonEchosounder_DP / 2004-128 / DP_817_128

Profile/Beam: 2/1

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

SWM EXT CFF WRK

CFF WRECK AT 57.22828927N , 135.51433406W ( 468947.04E , 6342915.68N ) IS NOT SIGNIFICANT TONAVIGATION.

Feature Correlation

Address Feature Range Azimuth Status

H11115/817_NonEchosounder_DP/2004-128/DP_817_128 2/1 0.00 000.0 Primary

Hydrographer Recommendations

[None]

Cartographically-Rounded Depth (Affected Charts):

0 ¾fm (17320_1, 16016_1, 530_1)

0fm 4ft (17324_1, 531_1)

-1.4m (500_1, 50_1)

Office Notes

Chart visible wreck according to this survey

H11115 Shoreline Report 1 - New Features

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Survey Summary



Timestamp: 2004-128.18:43:21.000 (05/07/2004)


Profile/Beam: 3/1

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

CFF RK IS EXT NEW LDG

Feature Correlation




[None]


0 ¼fm (17320_1, 16016_1, 530_1)

0fm 1ft (17324_1, 531_1)

-.5m (500_1, 50_1)

Office Notes

Chart ledge according to smooth sheet.


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Survey Summary



Timestamp: 2004-129.17:40:17.000 (05/08/2004)


Profile/Beam: 1/1

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

CFF RK EXT CHD (17324) LDG

Feature Correlation




[None]


0 ¼fm (17320_1, 16016_1, 530_1)

0fm 1ft (17324_1, 531_1)

-.4m (500_1, 50_1)

Office Notes

Chart ledge according to the smooth sheet.


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1.4) Profile/Beam - 1/1 from H11115 / 1103_Echosounder_DP / 2004-140 /DP_1103_140

Survey Summary


Least Depth: 10.16 m

Timestamp: 2004-140.15:37:48.000 (05/19/2004)

DP Dataset: H11115 / 1103_Echosounder_DP / 2004-140 / DP_1103_140

Profile/Beam: 1/1

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

CHD (17324) ISLET DISPROVAL

CHD (17324) ISLET AT POSITION 57°10'19.026"N , 135°27'24.306"W ( 472381.52E , 6336619.53N ) WASDISPROVED BY 4 MINUTE, 130 M SEARCH RADIUS VBES STAR PATTERN DURING CALMS SEASAND 4 M VISIBILITY. 100% SWMB COVERAGE.

Feature Correlation


H11115/1103_Echosounder_DP/2004-140/DP_1103_140 1/1 0.00 000.0 Primary



5 ½fm (17320_1, 16016_1, 530_1)

5fm 3ft (17324_1, 531_1)

10.1m (500_1, 50_1)

Office Notes

Remove charted islet chart area according to this survey.


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Survey Summary



Timestamp: 2004-140.15:39:41.000 (05/19/2004)


Profile/Beam: 2/1

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

CFF RK DISPROVAL

100% SWMB DISPROVES CFF ROCK AT POSITION 57°10'17.822"N , 135°27'33.340"W ( 472229.53E ,6336583.34N ).

Feature Correlation





9fm (17320_1, 16016_1, 530_1)

9fm 0ft (17324_1, 531_1)

16.7m (500_1, 50_1)

Office Notes

Remove charted rock, chart area according to the smooth sheet.


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Survey Summary



Timestamp: 2004-140.15:41:37.000 (05/19/2004)


Profile/Beam: 3/1

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

CFF RK DISPROVAL

100% SWMB DISPROVES CFF ROCK AT POSITION 57°10'16.272"N , 135°27'28.883"W ( 472304.07E ,6336534.91N ).

Feature Correlation




[None]


7 ¾fm (17320_1, 16016_1, 530_1)

7fm 4ft (17324_1, 531_1)

14.2m (500_1, 50_1)

Office Notes

Remove charted rock and chart area according to the smooth sheet.


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2 - AWOIS Features

2.1) Profile/Beam - 263/100 from h11115 / 1006_reson8101 / 2004-118 /299_2325

Primary Feature for AWOIS Item #52935

Search Position: 57.20989444° N, 135.49554722° W

Historical Depth: [None]

Search Radius: 100

Search Technique: VS, ES, DI, S2, SWMB

Technique Notes: [None]

History Notes:

History LNM 7/82--Olga Strait Light (LLNR 3364) permanently discontunued at lat. 57/12/36.9N, lon.135/29/37.6W. Some remanis of light structure remain per telecommunications with USCG 17th. (ENT DAS02/15/2002) 04/27/2004 NOAA Ship RAINIER conducted 100% SWMB coverage within search radius. Foundremains of light structure with least depth of 3.0 fathoms at position (5712'35.620"N , 13529'43.970"W (529933.61E , 6340859.61N ) within charted obstruction radius of LLNR 25080 - LIGHT 9 in Olga Strait.

Survey Summary


Least Depth: 5.62 m

Timestamp: 2004-118.23:25:44.845 (04/27/2004)

Survey Line: h11115 / 1006_reson8101 / 2004-118 / 299_2325

Profile/Beam: 263/100

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

AWOIS #52935 SHOAL SOUNDING

INVESTIGATION SUMMARY: THE SHOAL SOUNDING WAS VERIFIED WITH 100% SWMB. A LEASTDEPTH OF 3.0 FATHOMS WAS OBTAINED WITH OBSERVED TIDE CORRECTORS APPLIED.

Feature Correlation


h11115/1006_reson8101/2004-118/299_2325 263/100 0.00 000.0 Primary

OPR-O112-RA-H11115 AWOIS # 52935 33.89 298.5 Secondary

H11115 Shoreline Report 2 - AWOIS Features

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3fm (17320_1, 16016_1, 530_1)

3fm 0ft (17324_1, 531_1)

5.6m (500_1, 50_1)

Office Notes

Chart area according to this survey.

Feature Images

Figure 2.1.1


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2.2) Profile/Beam - 1171/148 from h11115 / 1016_reson8125 / 2004-117 /123_1748

Primary Feature for AWOIS Item #52963

Search Position: 57.19129444° N, 135.46797222° W

Historical Depth: [None]

Search Radius: 500

Search Technique: SD, DI, S2, SWMB

Technique Notes: SEARCH INSHORE OF 8 FM CURVE NOT REQUIRED FOR DISPROVAL

History Notes:

LNM 27/75; REPORTS THE SUNKEN WRECK OF A 32 FT. TROLLER, THE FORRESTER IN OLGASTRAIT IN 105 FT. OF WATER AT APPROX POSITION 57/11/30N, 135/27/58W. NOTED IN LNM: "THEWRECK IS NOT CONSIDERED A DANGER TO MAVIGATION". (ENT DAS 02/15/2002) 04/26/2004NOAA Ship RAINIER covered entire search radius with 100% SWMB, no significant contacts were found.

Survey Summary



Timestamp: 2004-117.17:52:39.342 (04/26/2004)

Survey Line: h11115 / 1016_reson8125 / 2004-117 / 123_1748

Profile/Beam: 1171/148

Charts Affected: 17324_1, 17320_1, 16016_1, 531_1, 500_1, 530_1, 50_1

Remarks:

AWOIS #52963 CHD (17324) WRECK DISPROVAL

INVESTIGATION SUMMARY: AWOIS #52963 AT POSITION 57°11'26.995"N , 135°28'04.221"W (471725.53E , 6338725.78N ) WAS DISPROVED DURING SHORELINE VERIFICATION WITH A 110M X80M VBES GRID PATTERN DURING CALM SEAS AND 4M VISIBILITY. 100% SWMB COVERAGE. NOSIGNIFICANT CONTACTS FOUND.

Feature Correlation


h11115/1016_reson8125/2004-117/123_1748 1171/148 0.00 000.0 Primary

OPR-O112-RA-H11115 AWOIS # 52963 52.12 171.1 Secondary


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Office Notes

Remove charted wreck PA from the chart.


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Descriptive Report to Accompany Hydrographic Survey H11004

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Transcript of Descriptive Report to Accompany Hydrographic Survey H11004