Pub. 117 Radio Navigational Aids 2002.pdf

RADIO

NAVIGATIONAL AIDS

PUB. 117

2002

IMPORTANT

THIS PUBLICATION SHOULD

BE CORRECTED EACH WEEK

FROM THE

NOTICE TO MARINERS

Prepared and published by the

NATIONAL IMAGERY AND MAPPING AGENCY

Bethesda, Maryland

NO COPYRIGHT CLAIMED UNDER TITLE 17 U.S.C.

For sale by the Superintendant of Documents, U.S. Government Printing Ofﬁce

Internet: bookstore.gpo.gov Phone: toll free (866) 512-1800; DC area (202) 512-1800

Fax: (202) 512-2250 Mail Stop: SSOP, Washington, DC 20402-0001

*7642014010071*

NSN 7642014010071

NIMA REF. NO.

RAPUB117

THE PRUDENT MARINER

a. Warning On Use Of Floating Aids To Navigation and on Aids to Navigation in General, to Fix a Navigational

Position.

The aids to navigation depicted on charts comprise a system consisting of ﬁxed and ﬂoating aids with varying degrees of

reliability. Therefore, prudent mariners will not rely solely on any single aid to navigation, particularly a ﬂoating aid. An

aid to navigation also refers to any device or structure external to a craft, designed to assist in determination of position.

This includes celestial, terrestrial, and electronic means, such as Global Positioning System (GPS) and Differential GPS

(DGPS). Here, too, the prudent mariner will not rely soley on any single aid to navigation.

The buoy symbol is used to indicate the approximate position of the buoy body and the sinker which secures the buoy to

the seabed. The approximate position is used because of practical limitations in positioning and maintaining buoys and

their sinkers in precise geographical locations. These limitations include, but are not limited to, inherent imprecisions in

position ﬁxing methods, prevailing atmospheric and sea conditions, the slope of and the material making up the seabed, the

fact that buoys are moored to sinkers by varying lengths of chain, and the fact that buoy and/or sinker positions are not

under continuous surveillance but are normally checked only during periodic maintenance visits which often occur more

than a year apart. The position of the buoy body can be expected to shift inside and outside the charting symbol due to the

forces of nature. The mariner is also cautioned that buoys are liable to be carried away, shifted, capsized, sunk, etc. Lighted

buoys may be extinguished or sound signals may not function as the result of ice or other natural causes, collisions, or other

accidents. Many of these factors also apply to articulated lights.

For the foregoing reasons, a prudent mariner must not rely completely upon the position or operation of ﬂoating aids to

navigation, but will also utilize bearings from ﬁxed objects and aids to navigation on shore. Further, a vessel attempting to

pass close aboard always risks collision with a yawing buoy or with the obstruction the buoy marks.

b. Use of Foreign Charts.

1. In the interest of safe navigation, caution should be exercised in the use of foreign charts not maintained through U.S.

Notice to Mariners.

2. Foreign produced charts are occasionally mentioned in NIMA Sailing Directions when such charts may be of a better

scale than U.S. produced charts. Mariners are advised that if or when such foreign charts are used for navigation it is their

responsibility to maintain those charts from the Notice to Mariners of the foreign country producing the charts.

3. The mariner is warned that the buoyage systems, shapes, colors, and light rhythms used by other countries often have

a different signiﬁcance than the U.S. system.

4. Mariners are further warned about plotting positions, especially satellite-derived positions such as from GPS, onto

foreign charts where the datum is unknown or the conversion from WGS-84 is unknown.

c. Chart Notes Regarding Different Datums.

Particular caution should be exercised during a passage when transferring the navigational plot to an adjacent chart upon

a different geodetic datum or when transferring positions from one chart to another chart of the same area which is based

upon a different datum. The transfer of positions should be done by bearings and distances from common features.

Notes on charts should be read with care, as they give important information not graphically presented. Notes in

connection with the chart title include the horizontal geodetic datum which serves as a reference for the values of the

latitude and longitude of any point or object on the chart. The latitudes and longitudes of the same points or objects on a

second chart of the same area which is based upon a different datum will differ from those of the ﬁrst chart. The difference

may be navigationally signiﬁcant. Additionally, datum changes between chart editions could signiﬁcantly affect the

positions of navigational aids found in the List of Lights and other NIMA publications.

Positions obtained from satellite navigation systems, such as from GPS, are normally referred to the World Geodetic

System 1984 (WGS-84) Datum. The differences between GPS satellite-derived positions and positions on some foreign

charts cannot be determined: mariners are warned that these differences MAY BE SIGNIFICANT TO NAVIGATION and

are therefore advised to use alternative sources of positional information, particularly when closing the shore or navigating

in the vicinity of dangers.

(NIMA/MISC)

PREFACE

The 2002 edition of Pub. 117, Radio Navigational Aids, is a

list of selected worldwide stations which provide electronic

services to the mariner. This edition cancels all previous

editions of Pub. 117. The listing is divided into chapters

according to the nature of the service performed by the

stations. The ﬁrst numeral (hundreds digit) of section numbers

of text and the ﬁrst numeral (thousands digit) of station

numbers correspond to the chapter number.

Radiobeacons, the only category of radio navigational aids not

listed in this book, are grouped geographically and carried in the

NIMA Lists of Lights, Pub. 110 - 116, and USCG Light Lists.

References to publications produced or sold by NIMA will

be followed by the stock number in parentheses.

Times quoted herein are, unless otherwise stated, in

Coordinated Universal Time (UTC) and hours are reckoned

from 0000 to 2359.

All bearings are true and are measured in degrees

clockwise from 000˚ (true north) to 359˚. The sectors of radio

direction finder stations are given as looking from the station

to seaward in accordance with international practice; it

should be noted that this is the reverse of the method used in

the light lists for expressing the sectors of lights.

Distances are reckoned in nautical miles unless otherwise

stated.

When the term “plain language” is used in the description of

the services rendered by a station, it signiﬁes that the service is

in the language of the country controlling the station, unless

stated to be otherwise.

The

(1) In kilohertz (kHz) up to and including 300 kHz.

(2) In megahertz (MHz) up to and including 300 MHz.

(3) In gigahertz (GHz) up to and including 300 GHz.

Note: In practice, kilohertz may be used up to 30,000 kHz.

Nothing in the manner of presentation or arrangement of

information

this

publication

implies

endorsement

acceptance

NIMA

matters

affecting

the

status

and

boundaries of states and territories.

This edition contains information available to the National

Imagery and Mapping Agency up to 5 October 2002, including

Notice to Mariners No. 40 of 2002. Corrections which have

accumulated since that date will be in Section II of the Notice

to Mariners which announces the issuance of this publication.

Subsequent corrections are included weekly in Section II. All

of these corrections should be applied in the appropriate places

and their insertion noted in the “Record of Corrections” on the

next page.

Mariners and other users are requested to forward new or

corrective

information

useful

the

correction

this

publication to:

MARITIME SAFETY INFORMATION DIVISION

ST D 44

NATIONAL IMAGERY AND MAPPING AGENCY

4600 SANGAMORE ROAD

BETHESDA MD 20816-5003

CAUTION

Plans for air defense of the United States may require

temporary suspension of the operations of certain electronic

aids to navigation with little or no advance notice.

hertz

the

unit

for

the

operating

frequencies

communications-electronics

equipment.

Frequencies

will

normally be expressed as follows:

RECORD OF CORRECTIONS

PUBLISHED IN WEEKLY NOTICE TO MARINERS

NOTICE TO MARINERS

YEAR 20___

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CONTENTS

Preface ...........................................................................................................................................................................................I

Table of Symbols .......................................................................................................................................................................VI

CHAPTER 1

Radio Direction Finder and Radar Stations ...............................................................................................................................1-3

CHAPTER 2

Radio Time Signals ....................................................................................................................................................................2-3

CHAPTER 3

Radio Navigational Warnings ....................................................................................................................................................3-3

CHAPTER 4

Distress, Emergency, and Safety Traffic ...................................................................................................................................4-3

CHAPTER 5

Stations Transmitting Medical Advice ......................................................................................................................................5-3

CHAPTER 6

Long Range Navigational Aids..................................................................................................................................................6-3

CHAPTER 7

Automated Mutual-Assistance Vessel Rescue System (AMVER)............................................................................................7-3

CHAPTER 8

Interim Emergency Procedures and Communication Instructions

for U.S. Merchant Ships in Times of Crisis, Conflict, National Emergency or War.................................................................8-3

Index I—Radio Aids to Navigation by Country ........................................................................................................................ I-1

Index II—Radio Aids to Navigation by Station......................................................................................................................... I-5

Index III—Cross Reference—International vs. U.S. Radio Aids ............................................................................................ I-13

III

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