Descriptive Report To Accompany Hydrographic Survey H11004

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NOAA FORM 76-35AU.S. DEPARTMENT OF COMMERCENATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATIONNATIONAL OCEAN SURVEYDESCRIPTIVE REPORTType of Survey:Navigable AreaRegistry Number:H11450LOCALITYState:MarylandGeneral Locality:Chesapeake BaySub-locality:Cedar Point to Little Cove Point2006CHIEF OF PARTYLT Charles “Jake” Yoos (June 2005 – March 2006)LT(jg) Briana Welton (April 2006 – March 2007)NOAALIBRARY & ARCHIVESDATE1

OPR-E349-BH-05H11450NOAA FORM 77-28U.S. DEPARTMENT OF COMMERCE(11-72)NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATIONJune 2005 – August 2006REGISTRY NUMBER:H11450HYDROGRAPHIC TITLE SHEETINSTRUCTIONS:The Hydrographic Sheet should be accompanied by this form, filled in as completely as possible, when the sheet is forwarded to the Office.State:MarylandGeneral Locality:Chesapeake BaySub-Locality:Cedar Point to Little Cove PointScale:1:10,000Date of Survey:06/09/2005 to 08/17/2006Instructions Dated:3 July 2005Project Number:OPR-E349-BH-05Vessel:NOAA S/V Bay HydrographerChief of Party:LT Charles “Jake” Yoos (June 2005 – March 2006)LT(jg) Briana Welton (April 2006 – March 2007)Surveyed by:Bay Hydrographer PersonnelSoundings by:Reson 7125, 8125 multibeam echo sounders, and Odom Echotrac MKIIIprecision survey echo sounderGraphic record scaled by:N/AGraphic record checked by:N/AProtracted by:N/AVerification by:Atlantic Hydrographic Branch PersonnelSoundings in:Meters at MLLWAutomated Plot: N/ARemarks:1) All Times are in UTC.2) This is a Navigable Area Hydrographic Survey.3) Projection is UTM Zone 18N.Red, bold, italic comments were made during office processing.2

OPR-E349-BH-05H11450June 2005 – August 2006Descriptive Report to Accompany Hydrographic Survey H11450Project OPR-E349-BH-05Cedar Point to Little Cove PointScale 1:10,000June 2005 – August 2006NOAA S/V Bay Hydrographer (s5501)Chiefs of Party: LT Charles “Jake” Yoos (June 2005 – March 2006)LT(jg) Briana Welton (April 2006 – March 2007)A. AREA SURVEYEDConcurThis hydrographic survey was completed as specified by Hydrographic Survey LetterInstructions OPR-E349-BH-05 * dated July 3, 2005, Standing Project Instructions* datedMarch 23, 2004, and NOS Hydrographic Specifications and Deliverables* dated March 5,2003, with the exception of deviations noted in this report. † The survey area is the centralChesapeake Bay from Cedar Point to Little Cove Point. This survey corresponds to sheet “F”in the sheet layout provided with the Letter Instructions*. Project OPR-E349-BH-05 respondsto requests from the Maryland Port Administration, Association of Maryland Pilots, U.S.Army Corps of Engineers, and the U.S. Coast Guard for contemporary survey to promote safenavigation for the growing international bulk and container trade in the Chesapeake Bay andBaltimore Harbor.Two hundred percent side scan (SSS) coverage was obtained in the survey area in waters 4meters and deeper. Significant Side scan contacts were developed with multibeamechosounder (MBES).Data acquisition began on June 9, 2005 (DN 160) and ended on August 17, 2006 (DN 229).The majority of the data were acquired during the fall of 2005.*†Filed with original field recordsConcur with clarification. Survey completed partially as specified. Reference ER for further information.3

OPR-E349-BH-05H11450June 2005 – August 2006Figure 1. H11450 Survey Limits (Chart 12264).4

OPR-E349-BH-05H11450B. DATA ACQUISTION AND PROCESSINGJune 2005 – August 2006ConcurA complete description of data acquisition and processing systems, survey vessels, qualitycontrol procedures and data processing methods can be found in the OPR-E349-BH-05 DataAcquisition and Processing Report (DAPR) * , submitted under separate cover. Items specificto this survey, and any deviations from the aforementioned report are discussed in thefollowing sections.Final, Approved Water Levels have been applied to this survey. See Section C. foradditional information.B1. Equipment and VesselsConcurAll data for this survey were acquired by Bay Hydrographer. In the spring of 2006, the Reson8125 MBES was replaced with a new Reson 7125 MBES (see DAPR † ).B2. Quality ControlCrosslinesVertical Beam Echo Sounder (VBES) crosslines totaled 39.8 nautical miles, comprising14.4% of mainscheme hydrography. Crossline and mainscheme bathymetry were manuallycompared in Caris HIPS Subset Mode. Vertical Beam Echo Sounder (VBES) crosslines agreewith mainscheme VBES with no discernable discrepancy. Vertical Beam Echo Soundercrosslines agree within 0.15 meters of MBES developments.A statistical Quality Control Report was not conducted because the Pydro check pointcomparison tool and Caris QC tool were not functional at the time of this survey.JunctionsConcurNo contemporary hydrography was available to compare with this survey, and therefore ajunction comparison was performed.Data Quality FactorsConcurThe primary mission of Bay Hydrographer is to test and evaluate new and emerginghydrographic and oceanographic technologies. Traditional hydrographic surveys such asH11450 are conducted with newly upgraded software and firmware before they areintroduced to the NOAA hydrographic fleet. This operational paradigm is a factor thatsometimes affects data quality and is noted and accounted for accordingly during dataprocessing. Specific instances are noted below.*†Filed with original field recordsFiled with original field records5

OPR-E349-BH-05H11450June 2005 – August 2006The Reson 8125 MBES on Bay Hydrographer was replaced with a Reson 7125 MBES in thespring of 2006. The Reson 7125 was a new system to Reson and to NOAA at the time ofinstallation, and the first of its kind to be integrated on a NOAA survey platform. Over thecourse of the year succeeding the installation, numerous “bugs” were identified between theintegration of the Isis acquisition software and the Reson 7P, and hence various beta versionsof Isis 7.0 were used. Multiple Reson 7125 firmware upgrades were also made during thetime since installation. However, comparisons of Reson 7125 patch test data to Reson 8125patch test data over the same “patch test” wreck revealed similar least depths.The MBES mounting arm aboard Bay Hydrographer “wobbles” in seas greater than one-anda-half feet. The residual artifact of pole-wobble is similar to that of uncorrected roll. Severepole-wobble artifact is found in data acquired on DN 2006-170 over the shoal in the northeastcorner of the sheet (Figure 5 in Section D). Outer-beams beyond 20 degrees were filtered outin order to stay within acceptable errors to meet IHO Order 1. *The VBES data acquired in the southeast corner of the sheet were deleted from the projectduring the final stages of survey analysis (Figure 2). The data acquired in this section of thesurvey were uncorrectable, and so bathymetry for chart update in this area does not exist.Due to the age of the survey, the data was not re-acquired, further delaying surveysubmission.Figure 2. Area of discarded VBES data in SE corner of sheet.*Do not concur. See the Evaluation Report for further detail.6

OPR-E349-BH-05B3. Data ReductionH11450June 2005 – August 2006ConcurReson 7125 data were initially converted with a beta converter file provided by Caris. WhenCaris HIPS/SIPS 6.1 was released early in 2007, the hydrographer learned that Reson 7125data converted with a beta converter require re-conversion with Caris 6.1. The CarisHydrographic Vesssel File (HVF) also required modification: the vessel offsets in the “swath”field were removed and retained only in the “svp” field. The waterline portion of the HVFwas also set to “no” before re-correcting the data. The data were thus reconverted and recleaned.The new convert Reson7K.dll packaged with Caris 6.1 includes code to apply transducer XY rotation during the sound velocity correction. This new treatment of the HVF applies toReson 7125 and Simrad sonar data only, and was first introduced in Caris 6.0SP2HF21. Seethe emails from the Caris HelpDesk on this subject (Caris HelpDesk Request IDs 00700575and 00702470). The data required re-conversion due to a noted difference in the processedtwo-way travel time of the data converted with the beta converter and the Caris 6.1-supportedconverter.The Sound Velocity profile selection method used was ‘nearest in time’ due to the large timegaps between data acquisition.All other data reduction procedures for survey H11450 conform to those detailed in theDAPR * .B4. Data RepresentationThough many BASE surfaces were used for the processing of H11450, the final submission isshown in Figures 3 and 4. The submission field sheets have fewer than 25x106 nodes exceptH11450, which bounds the entire survey area.*Filed with original field records7

OPR-E349-BH-05H11450June 2005 – August 2006Figure 3: Field sheets, surfaces, and mosaics submitted with H11450.Figure 4: Layout of field sheets, BASE surfaces, and their resolutions for H11450.8

OPR-E349-BH-05H11450C. VERTICAL AND HORIZONTAL CONTROLJune 2005 – August 2006ConcurProject OPR-E349-BH05-05 required neither horizontal control work nor subordinate tidestation installation and thus no Horizontal and Vertical Control Report will be submitted.Horizontal ControlThe horizontal datum for this project is the North American Datum of 1983 (NAD83).Differential GPS (DGPS) was the sole method of positioning. The differential correctorbeacons utilized for this survey are given in Table 1.Location Frequency Custodian Range PriorityAnnapolis 301 kHzUSCG290 KM PrimaryTable 1: Differential Corrector Sources for H11450.Vertical ControlThe vertical datum for this project is Mean Lower-Low Water (MLLW). The operatingNational Water Level Observation Network (NWLON) primary tide station at Solomons, MD(857-7330) served as control for datum determination and as the primary source for waterlevel reducers for survey H11450.No tertiary gauges were required.D. RESULTS AND RECOMMENDATIONSD.1. Chart ComparisonD.1.a. Survey Agreement with ChartSurvey H11450 was compared with the following chart:Chart ScaleEdition and Date Latest Notice to Mariners Applied12264 1:40,000 30th Ed, July 2007 10/20/2007Table 2: Charts compared with H11450Surveyed depths generally agree within one to three feet of charted depths, with minorshifting of contours. The shoal in the northeast corner of the sheet (Figure 5) was developedwith “skunk stripped” MBES to better define the shoal. Severe “pole wobble” artifacts werepresent in the data, and so a swath-angle filter was applied to these data. Figure 5 depicts theshoal development before and after filtering. **Concur with clarification. No comparisons were made to the affected ENC. See also the Evaluation Report.9

OPR-E349-BH-05H11450June 2005 – August 2006Figure 5: “Pole wobble” artifacts before and after filtering.The charted fish haven area with an authorized depth of 15 feet in the southwest corner of thesurvey area should be expanded to include the debris found in the vicinity outside of thecharted area. See “H11450 Feature Report” in Appendix II * of this report for such featuresthat should be included in the fish haven area. Figure 6 depicts the contacts outside of the fishhaven area.The Hydrographer has determined that data accuracy standards and bottom coveragerequirements have been met and survey data are adequate to supersede charted data in theircommon areas, with the following exceptions: †D.1.b. Dangers to Navigation†Concur with ClarificationOne (1) Dangers to Navigation (DTONs) was found on survey H11450, and reported to theMarine Chart Division via email on June 19, 2006. The original DTON submission packageis included in Appendix IV*. Descriptions of each DTON are included in the Survey FeatureReport in Appendix I*.D.1.c. Other FeaturesConcurAutomated Wreck and Obstruction Information System (AWOIS) InvestigationsFive (5) AWOIS items fall the within the survey limits of H11450. Descriptions of eachAWOIS item investigation are included in the Survey Feature Report in Appendix I*.Additional Items*†Appended to this reportSee also the Evaluation Report10

OPR-E349-BH-05H11450June 2005 – August 2006Additional features investigated within the limits of H11450 are described in the SurveyFeature Report in Appendix I*.D.2. Additional ResultsD.2.a. Prior Survey ComparisonConcurPrior survey comparison with H11450 was not performed.D.2.b. Shoreline VerificationConcurShoreline verification was not performed for survey H11450.D.2.c. Aids to Navigation *Concur with clarificationThere are seven aids to navigation (ATON) in H11450. The two private buoys marking thefish haven north of Cedar Point move frequently, though they serve their intended purpose.The fish haven itself spills beyond the boundary of the charted area. All other aids werefound to be correctly charted and serve their intended purpose.D.2.d. Overhead featuresConcurThere are no overhead features in survey H11450.D.2.e. Submarine Cables and PipelinesConcurThere are no submarine cables or pipelines in H11450.D.2.f. Ferry RoutesConcurThere are no ferry routes on H11450.D.2.g. Bottom SamplesConcurThirty-one bottom samples were taken within the limits of H11450. The bottom type variesfrom sand, silt, shell, and mud; and generally agrees with charted bottom characteristics.D.2.h MiscellaneousConcur with clarificationTwo fish haven areas are charted within the limits of H11450.*See also the Evaluation Report11

OPR-E349-BH-05H11450June 2005 – August 2006Numerous debris piles were found near but outside the charted area of the fish haven in thesouthwest of the survey. The fish haven area should be expanded to include the debris in thevicinity of the charted fish haven area (Figure 5).Figure 6: Numerous contacts outside southern fish haven.The charted fish haven in the northern section of H11450 contains all debris except the fishweir north of the charted fish haven area. The fish weir was submitted as a DTON, and iscurrently charted as a seven foot obstruction. However, a single stake with a least depth of 13feet is located about 40 meters southeast of the charted obstruction (see Figure 7). A secondDTON was not submitted due to the proximity of the 7-foot obstruction and the scale of thechart.Do Not Concur. The office recommends including the 13 foot stake as part of an“Obstruction Area”. See the Evaluation Report for further discussion.12

OPR-E349-BH-05H11450June 2005 – August 2006Figure 7: Northern fish haven area and fish weir obstruction (submitted as DTON).The charted pilot area in the center of H11450 corresponds to a pilot exchange area in whichBaltimore Pilots rotate on and off vessels midway through their transits through theChesapeake Bay. A pilot station is maintained by the Baltimore Pilots Association in MillCreek, near Solomon’s Island, out of which their pilot boats operate.13

OPR-E349-BH-05H11450June 2005 – August 2006E. APPROVALI have completed and reviewed the attached survey data and reports. The survey data meets orexceeds requirements set forth in the NOS Hydrographic Surveys and SpecificationsDeliverables Manual, Field Procedures Manual, Standing and Letter Instructions, and HSDTechnical Directives, except where noted. These data are adequate to supersede charted datain their common areas. All data and reports are respectfully submitted to AtlanticHydrographic Branch.LT(jg) Briana J. Welton, NOAAMid-Atlantic Region Hydro Team LeaderNavigation Response Branch14

Appendix 1: DTON Reports

OPR-E349-BH Danger to Navigation ReportRegistry Number:H11450State:MarylandLocality:Chesapeake BaySub-locality:Cedar Point to Little Cove PointProject Number:S-E349-BH-05Survey Date:05/02/2006This report includes information associated with one danger to navigation (DtoN), located in the project area ofOPR-E349-BH.Charts AffectedNumberEditionDateScale (RNC)RNC Correction(s)*1226429th01/01/20051:40,000 (12264 1)[L]NTM: ?1223061st11/01/20031:80,000 (12230 1)[L]NTM: ?122805th10/01/20041:200,000 (12280 1)[L]NTM: ?1300348th10/01/20041:1,200,000 (13003 1)[L]NTM: ?* Correction(s) - source: last correction applied (last correction reviewed--"cleared udeSurveyLongitudeAWOISItem1.1Obstruction2.23 m38 20' 50.8" N076 22' 58.4" W---Generated by Pydro v8.6 (r2366) on Tue Jul 29 18:12:01 2008 [UTC]

1 - Danger To Navigation

OPR-E349-BH Danger to Navigation Report1 - Danger To Navigation1.1) Profile/Beam - 1401/200 from h11450 / bh s5501 reson7125 / 2006-122 /008 1615DANGER TO NAVIGATIONSurvey SummarySurvey Position:38 20' 50.8" N, 076 22' 58.4" WLeast Depth:2.23 m ( 7.30 ft 1.217 fm 1 fm 1.30 ft)TPU ( 1.96σ):THU (TPEh) 3.922 m ; TVU (TPEv) 0.204 mTimestamp:2006-122.16:16:20.221 (05/02/2006)Survey Line:h11450 / bh s5501 reson7125 / 2006-122 / 008 1615Profile/Beam:1401/200Charts Affected:12264 1, 12230 1, 12280 1, 13003 1Remarks:This feature is the least depth on one of a number of submerged pound net (fish weir) stakes. The stakes arearranged in a linear pattern, with the northernmost stake located at 38 20'52.143" , -076 23'00.647", and thesouthernmost stake at 38 20'48.278" , -076 22'54.387".Feature bh s5501 reson7125/2006-122/008 16151401/2000.00000.0Primaryh11450/bh s5501 reson8125/2006-020/936 16351356/1580.45334.6Secondaryh11450/bh s5501 reson8125/2006-020/936 16351427/2297.32123.9Secondary (grouped)h11450/bh s5501 reson8125/2006-020/936 16351427/2397.37123.6Secondary (grouped)h11450/bh s5501 klein5000 sss100/2005-265/108 135600017.46240.3Secondary (grouped)h11450/bh s5501 reson8125/2006-020/947 16301196/2288.51311.8Secondary (grouped)h11450/bh s5501 reson8125/2006-020/943 16051537/23112.86129.3Secondary (grouped)h11450/bh s5501 klein5000 sss100/2005-265/109 1419000213.08028.7Secondaryh11450/bh s5501 reson8125/2006-020/948 16221467/115.22311.0Secondary (grouped)h11450/bh s5501 reson8125/2006-020/943 16051601/6721.05128.6Secondary (grouped)h11450/bh s5501 reson8125/2006-020/948 16221417/12222.02310.2Secondary (grouped)h11450/bh s5501 reson8125/2006-020/948 16221386/21127.63308.4Secondary (grouped)h11450/bh s5501 reson8125/2006-020/944 16131684/24027.87127.4Secondary (grouped)h11450/bh s5501 reson7125/2006-122/007 16011090/25128.10125.8Secondary (grouped)Page 3

OPR-E349-BH Danger to Navigation Report1 - Danger To Navigationh11450/bh s5501 reson8125/2006-020/949 16091440/24029.40311.7Secondary (grouped)h11450/bh s5501 klein5000 sss100/2005-265/109 1419000134.08321.5Secondary (grouped)h11450/bh s5501 reson8125/2006-020/944 16131747/20734.25127.5Secondary (grouped)h11450/bh s5501 reson8125/2006-020/949 16091497/21236.75309.3Secondary (grouped)h11450/bh s5501 reson8125/2006-020/944 16131807/10040.36127.3Secondary (grouped)h11450/bh s5501 reson8125/2006-020/949 16091560/8643.70310.0Secondary (grouped)h11450/bh s5501 reson7125/2006-122/007 16092828/25556.37308.7Secondary (grouped)h11450/bh s5501 reson7125/2006-122/007 16091960/12109.09309.3Secondary (grouped)Hydrographer RecommendationsThe hydrographer recommends charting a 7ft obstruction located in the position of this pound net stake.Cartographically-Rounded Depth (Affected Charts):7ft (12264 1, 12230 1, 12280 1)1 ¼fm (13003 1)S-57 DataGeo object 1:Obstruction (OBSTRN)Attributes:QUASOU - 6:least depth knownSORDAT - 20060817SORIND - US,US,nsurf,H11450TECSOU - 2,3:found by side scan sonar,found by multi-beamVALSOU - 2.225 mVERDAT - 12:Mean lower low waterWATLEV - 3:always under water/submergedOffice NotesAHB Concurs with clarification. Stakes should be charted an area obstruction encompassing the series of stakeswith least depth of 2.225 meters.[Image file z:/opr-e349-bh-05-cenchesbay/bay hydrographer 2006/h11450/pss/photos/fish weir.bmp does notexist.]Page 4

H11450 Feature ReportRegistry Number:H11450State:MarylandLocality:Chesapeake BaySub-locality:Cedar Point to Little Cove PointProject Number:S-E349-BH-05Survey Dates:06/09/2005 - 05/02/2006This is a report of features found during survey H11450, OPR-E349-BH-05, Central Chesapeake

Caris HIPS/SIPS 6.1 was released early in 2007, the hydrographer learned that Reson 7125 data converted with a beta converter require re-conversion with Caris 6.1. The Caris Hydrographic Vesssel File (HVF) also required modificat

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