VOLUME I Multinational Maritime Tactical Instructions and Procedures

MTP 1(D), Vol. I
Figure 2-1. Sample Georef Chart
GJPJ indicates a 1° area with its SW corner at latitude 38° N, longitude 77° W.
(3) Each 1° area is divided into sixty 1-minute units eastward and sixty 1-minute units northward.
These 1-minute units are designated by numbers, reading right-up from the SW corner of each 1° area. A
Georef report composed of four letters and four numerals is all that is required to locate any 1-minute
area in the world.
-EXAMPLE-
-EXAMPLE-
WGAN 5630 indicates a 1-minute area with its SW corner at latitude 12°30’ N, longitude
120°56’ E.
(4) Further accuracy, if desired, can be obtained by reporting each 1-minute unit in tenths (or hundredths)
of a minute eastward and northward. This requires a six (or eight) numeral reference. For example,
WGAN 56503060 indicates a point at latitude 12°30’36" N, longitude 120°56’30" E. (Note that
2-2 ORIGINAL