Name: COLREGS Demarcation Lines
Published: 2019-05-16

Short Citation
Office for Coastal Management, 2024: COLREGS Demarcation Lines, https://www.fisheries.noaa.gov/inport/item/56121.
Full Citation Examples

Abstract

U.S. collision regulation boundaries delineate those waters upon which mariners shall comply with the International Regulations for Preventing Collisions at Sea, 1972 (72 COLREGS) and those waters upon which mariners shall comply with the Inland Navigation Rules. The waters inland of these lines are subject to the Inland Navigation Rules Act of 1980. The waters outside these lines are subject to the International Navigation Rules of the International Regulations for Preventing Collisions at Sea, 1972 (COLREGS). The Coast Guard has the legal authority to effect regulatory changes to COLREGS. Records in this database are derived from descriptions published in the Code of Federal Regulations Title 33, Part 80 and are for planning purposes only.

https://marinecadastre.gov/data/

Marine Cadastre Data Registry
https://marinecadastre.gov/downloads/data/mc/COLREGSDemarcationLine.zip

Use Constraints:

For coastal and ocean planning

boundaries, ENVIRONMENTAL GOVERNANCE/MANAGEMENT, oceans, transportation

Type

Title

Entity

COLREGS Demarcation Lines

Point of Contact
NOAA Office for Coastal Management (NOAA/OCM)
coastal.info@noaa.gov
(843) 740-1202
https://coast.noaa.gov

Geographic Area 1

-178.110405° W, 166.634428° E, 71.182005° N, -14.295391° S

Time Frame 1
2019-05-16

publication date

Title:	COLREGS Demarcation Lines
Status:	Completed
Publication Date:	2019-05-16
Abstract:	U.S. collision regulation boundaries delineate those waters upon which mariners shall comply with the International Regulations for Preventing Collisions at Sea, 1972 (72 COLREGS) and those waters upon which mariners shall comply with the Inland Navigation Rules. The waters inland of these lines are subject to the Inland Navigation Rules Act of 1980. The waters outside these lines are subject to the International Navigation Rules of the International Regulations for Preventing Collisions at Sea, 1972 (COLREGS). The Coast Guard has the legal authority to effect regulatory changes to COLREGS. Records in this database are derived from descriptions published in the Code of Federal Regulations Title 33, Part 80 and are for planning purposes only.
Purpose:	To support ocean planning activities pursuant to the Executive Order Regarding the Ocean Policy to Advance the Economic, Security, and Environmental Interests of the United States, the Energy Policy Act, the National Environmental Policy Act, the Rivers and Harbors Act, and the Coastal Zone Management Act.
Supplemental Information:	Bureau Code: 006:48, Program Code: 006:055

Theme Keywords

Thesaurus

Keyword

Global Change Master Directory (GCMD) Science Keywords

EARTH SCIENCE > HUMAN DIMENSIONS > ENVIRONMENTAL GOVERNANCE/MANAGEMENT

ISO 19115 Topic Category

boundaries

ISO 19115 Topic Category

oceans

ISO 19115 Topic Category

transportation

UNCONTROLLED

None

coastal

None

planning

None

renewable energy

Spatial Keywords

Thesaurus

Keyword

Global Change Master Directory (GCMD) Location Keywords

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA

UNCONTROLLED

None

Territorial Sea

None

United States of America

City:	Charleston
State/Province:	SC

Data Set Scope Code:	Data Set
Maintenance Frequency:	As Needed
Data Presentation Form:	Map (digital)
Entity Attribute Overview:	effectiveDate, state, boundaryIdentifier, instanceCode
Distribution Liability:	https://www.marinecadastre.gov/about/disclaimer.html
Data Set Credit:	U.S. Coast Guard, NOAA Office for Coastal Management, Bureau of Ocean Energy Management

Point of Contact

CC ID: 836661

Date Effective From:	2019-05
Date Effective To:
Contact (Organization):	NOAA Office for Coastal Management (NOAA/OCM)
Address:	2234 South Hobson Ave Charleston, SC 29405-2413
Email Address:	coastal.info@noaa.gov
Phone:	(843) 740-1202
URL:	https://coast.noaa.gov

Currentness Reference:	Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 836665

W° Bound:	-178.110405
E° Bound:	166.634428
N° Bound:	71.182005
S° Bound:	-14.295391

Extent Group 1 / Time Frame 1

CC ID: 836664

Time Frame Type:	Discrete
Start:	2019-05-16
Description:	publication date

Spatial Representation

Vector Representation 1

CC ID: 901080

Complex Object Present?:	No
Composite Object Present?:	No
Curve Object Present?:	Yes
Point Object Present?:	No
Solid Object Present?:	No
Surface Object Present?:	No

Reference Systems

Reference System 1

CC ID: 901081

Coordinate Reference System

CRS Type:

Geographic 2D

EPSG Code:

EPSG:4269

EPSG Name:

NAD83

▾ See Full Coordinate Reference System Information

Datum Name:

North American Datum 1983

Ellipsoid:

GRS 1980

Semimajor Axis:

6378137.0

Flattening Ratio:

298.257222101

Axis: Geodetic Latitude

Order:	1
Abbreviation:	Lat
Units:	degree
Orientation:	north

Axis: Geodetic Latitude

Order:	1
Abbreviation:	Lat
Units:	degree
Orientation:	north

Axis: Geodetic Longitude

Order:	2
Abbreviation:	Lon
Units:	degree
Orientation:	east

Axis: Geodetic Longitude

Order:	2
Abbreviation:	Lon
Units:	degree
Orientation:	east

Security Class:	Unclassified
Data Use Constraints:	For coastal and ocean planning

Distribution 1

CC ID: 836669

Download URL:	https://marinecadastre.gov/data/
Distributor:
Description:	Marine Cadastre Data Registry

Distribution 2

CC ID: 836668

Download URL:	https://marinecadastre.gov/downloads/data/mc/COLREGSDemarcationLine.zip
Distributor:

Description:	Microsoft Windows, ArcGIS Pro

Accuracy:	Untested
Horizontal Positional Accuracy:	Compiled to meet 10 meters horizontal accuracy at 95% confidence level
Completeness Report:	Untested
Conceptual Consistency:	These data are logically consistent

Sources

33 CFR Part 80 COLREGS Demarcation Lines

CC ID: 1176861

Contact Role Type:	Originator
Contact Type:	Organization
Contact Name:	U.S. Coast Guard
Publish Date:	1981-05-26
Extent Type:	Discrete
Extent Start Date/Time:	1981
Citation URL:	https://www.ecfr.gov/current/title-33/chapter-I/subchapter-D/part-80
Source Contribution:	Geographic coordinates expressed in terms of latitude or longitude

COLREGS Demarcation Lines

CC ID: 836650

Contact Role Type:	Publisher
Contact Type:	Organization
Contact Name:	NOAA Office of Coast Survey
Extent Type:	Discrete
Extent Start Date/Time:	2018-07-01
Citation URL:	https://seamlessrnc.nauticalcharts.noaa.gov/arcgis/rest/services/RNC/NOAA_RNC/MapServer
Citation URL Name:	Source Online Linkage
Citation URL Description:	URL where the source data were originally accessed.
Source Contribution:	Raster display of NOAA nautical charts containing COLREGS Demarcation Lines

Process Steps

Process Step 1

CC ID: 836654

Description:

• Original source data and metadata acquired

• Heads up digitize, or coordinate input from original sources

• Cross reference between sources

• Dissolved unnecessary polyline splits and removed multiparts

• On MMS layers dissolved "BDRY_APRV_"

• On OC layers dissolved "APPRVDATE"

• Populated attribute contents

• Validated geometry

Process Date/Time:

2010-01-01 00:00:00

Process Step 2

CC ID: 836651

Description:

• Create a new map document RNC service http://egisws02.nos.noaa.gov/ArcGIS/services/NOAA_RNC

• Add original feature class and scan for features in CollisionRegulationsBoundary feature class which were missing on RNC

• Search COLREGS in the CFR to confirm presence in original feature class

• Edit identified features, including descriptions and related fields in the attribute table

• Use CFR list of up-to-date locations of Collision Regulations to verify their locations in Atlantic, Gulf of Mexico, and Pacific Oceans

Process Date/Time:

2012-01-01 00:00:00

Process Step 3

CC ID: 836653

Description:

• Create a new map document RNC service http://egisws02.nos.noaa.gov/ArcGIS/services/NOAA_RNC

• Add original feature class and scan for features in CollisionRegulationsBoundary feature class which were missing on RNC

• Create bookmarks in ArcMap of missing or erroneous features and features whose geometry does not match their RNC counterpart

• Check current CFR to confirm presence of features in original feature class and to see if new features need to be added

• Edit identified features, including descriptions and related fields in the attribute table

Process Date/Time:

2014-07-01 00:00:00

Process Step 4

CC ID: 836655

Description:

• Compare original data from MarineCadastre.gov data registry to the 2014 Code of Federal Regulations (CFR) and Raster Navigational Charts (RNC)

• Use smallest scale RNC to evaluate features

• Add new features from CFR and RNC, and remove old features

• Update attribute fields

Process Date/Time:

2015-04-01 00:00:00

Process Step 5

CC ID: 836652

Description:

• Download new version of CFR from https://www.govinfo.gov/content/pkg/CFR-2018-title33-vol1/pdf/CFR-2018-title33-vol1.pdf

• Adjust geometry of updated COLREGS lines later than 07/01/2014

• These include: 80.155, 80.160, 80.165, 80.501, 80.502, 80.712, 80.748, 80.815, 80.1420, 80.1430, 80.1440, 80.1450, 80.1460, 80.1470

• Use RNC map service as a guide to recreate new geometries

Process Date/Time:

2019-02-01 00:00:00

Rubric scores updated every 15m

Type

Title

Entity

COLREGS Demarcation Lines

Catalog Item ID:	56121
GUID:	gov.noaa.nmfs.inport:56121
Metadata Record Created By:	Anna Verrill
Metadata Record Created:	2019-04-25 11:47+0000
Metadata Record Last Modified By:	Daniel Martin
Metadata Record Last Modified:	2024-08-15 13:40+0000
Metadata Record Published:	2019-04-25
Owner Org:	OCM
Metadata Publication Status:	Published Externally
Do Not Publish?:	N
Metadata Last Review Date:	2019-04-25
Metadata Review Frequency:	1 Year
Metadata Next Review Date:	2020-04-25

Summary

Distribution Information

Controlled Theme Keywords

Child Items

Contact Information

Extents

Item Identification

Keywords

Theme Keywords

Spatial Keywords

Physical Location

Data Set Information

Support Roles

Point of Contact

Extents

Extent Group 1

Extent Group 1 / Geographic Area 1

Extent Group 1 / Time Frame 1

Spatial Information

Spatial Representation

Vector Representation 1

Reference Systems

Reference System 1

Coordinate Reference System

Axis: Geodetic Latitude

Axis: Geodetic Latitude

Axis: Geodetic Longitude

Axis: Geodetic Longitude

Access Information

Distribution Information

Distribution 1

Distribution 2

Technical Environment

Data Quality

Lineage

Sources

33 CFR Part 80 COLREGS Demarcation Lines

COLREGS Demarcation Lines

Process Steps

Process Step 1

Process Step 2

Process Step 3

Process Step 4

Process Step 5

Child Items

Catalog Details