1.1. Definition

2. Datums

2.1. Horizontal Datum

2.2. Sounding Datum

2.3. Time

3. Hydrographic Position Control

3.1. Horizontal Position Accuracy

3.2. Differential Global Positioning System (DGPS)

3.2.1. DGPS Specifications

3.2.2. DGPS Site Confirmation

4. Tides and Water Levels Requirements (Sections 4.1 through 4.4.3)

4.1. General Project Requirements and Scope

4.1.1. Scope

4.1.2. Objectives

4.1.3. Planning and Preliminary Tidal Zoning

4.1.4. NOS Control Stations and Data Quality Monitoring

4.1.5. General Data and Reference Datum Requirements

4.1.6. Error Budget Considerations

4.2. Data Collection and Field Work

4.2.1. Water Level Station Requirements

4.2.2. Water Level Measurement Systems and Data Transmissions

4.2.3. Station Installation, Operation and Removal

4.2.4. Tide Staffs

4.2.5. Bench Marks and Leveling

4.2.6. Water Level Station Documentation

4.2.7. Additional Field Requirements

4.3. Data Processing and Reduction

4.3.1. Data Quality Control

4.3.2. Data Processing and Tabulation of the Tide

4.3.3. Computation of Monthly Means

4.3.4. Data Editing and Gap Filling Specifications

4.4. Computation of Tidal Datums and Water Level Datums

4.4.1. National Tidal Datum Epoch

4.4.2. Computational Procedures

4.4.3. Tidal Datum Recovery

4.4.4. Quality Control (Sections 4.4.4 through 4.7)

4.4.5. Geodetic Datum Relationships

4.5. Final Zoning and Tide Reducers

4.5.1. Water Level Station Summaries

4.5.2. Construction of Final Tidal Zoning Schemes

4.5.3. Tide Reducer Files and Final Tide Note

4.6. Data Submission Requirements

4.6.1. Station Documentation

4.6.2. Water Level Data

4.6.3. Tabulations and Tidal Datums

4.6.4. Tide Reducers and Final Zoning and Final Tide Note

4.6.5. Submission

4.7. Guidelines and References

5. Depth Sounding

5.1. Sounding Units

5.2. Accuracy and Resolution Standards

5.2.1. Accuracy Standards

5.3. Multibeam Sonar Requirements

5.3.1. General

5.4. Corrections to Echo Soundings

5.4.1. Instrument Error Corrections

5.4.2. Draft Corrections

5.4.3. Velocity of Sound Corrections

5.4.4. Heave, Roll, Pitch, Heading, and Navigation Timing Error Corrections

5.4.5 Error Budget Analysis for Depths

5.5. Quality Control

5.5.1. Multibeam Sonar Calibration

5.5.2. Positioning System Confidence Checks

5.5.3. Crosslines

5.5.4. Multibeam Sun-Illuminated Digital Terrain Model

(DTM) Images

6. Towed Side Scan Sonar

6.1. Coverage

6.2. Side Scan Acquisition Parameters and Requirements

6.2.1. Accuracy

6.2.2. Speed

6.2.3. Towfish Height

6.2.4. Horizontal Range

6.3. Quality Control

6.3.1. Confidence Checks

6.3.2. Significant Contacts

6.3.3. Contact Correlation

6.3.4. Identification of Potential Field Examinations

7. Other Data

7.1. Bottom Characteristics

7.2. Aids to Navigation

8. Deliverables

8.1. Field Reports

8.1.1. Progress Sketch

8.1.2. Danger to Navigation Report

8.1.3. Descriptive Report

8.1.4. Descriptive Report Appendices

8.2. Preliminary Smooth Sheet

8.2.1. Specifications

8.2.2. Cartographic Specifications and Conventions

8.3. Shallow-Water Multibeam Sonar Swath Coverage Plot

8.4. Side Scan Sonar

8.4.1. Side Scan Sonar Coverage Plot

8.4.2. Side Scan Sonar Contact List and Plot

8.4.3. Sonargrams

8.5. Digital Data Files

8.5.1. Media

8.5.2. Single-beam Data

8.5.3. Shallow-Water Multibeam Data

8.5.4. Side Scan Sonar Data

Appendix 1

NOAA Form 77-12 Tide Station Report &
N/OMA121 Form 91-01 Next Generation Water Level
Measurement System Site Report

Appendix 2

NOS Cartographic Codes and Symbols

Appendix 3

NOAA Form 76-35A Descriptive Report Cover Sheet

Appendix 4

NOAA Form 77-28 Descriptive Report Title Sheet

Appendix 5

NOAA Form 76-40

Appendix 6

Abstract of Times of Hydrography For Smooth Tides or Water Levels

Appendix 7

Example Request for Smooth Tides/Water Levels Letter

Appendix 8

Standard Depth Curve Intervals and Color

Table 1: Standard Depth Curves

Table 2: Supplemental Depth Curves

Table 3: Standard Metric Depth Curves

Appendix 9

Danger to Navigation Report

Example # 1 Danger to Navigation Report

Example #2(a) Chartlet toNavigation
Report

Example #2(b) Acquisition and Processing Report

Appendix 10

Data Acquisition and Processing Report