Encl: (1) to COMDTINST 3161.2G
28 mar 1988
UNCLASSIFIED
OPNAVINST S5513.5A
(2)
Survey data based on Loran-C, or comparable horizontal positioning control and
conducted at a line spacing or with sonar equipments which would yield fix results
using bathymetric navigation recovery techniques to within 0.25 nautical miles: S-
OADR.
(3)
Charts compiled directly from classified data shall be classified at least at the same
level as the original survey data.
(4)
Precise bathymetric navigation zone charts (PBNZC), similar bathymetric products,
and related information: TS-OADR.
(5)
Charts compiled from sanitized secret data (i.e., Contour interval increased, survey
line spacing notations deleted, etc.) may be downgraded to confidential when the
scale of the published chart is one degree of longitude equals four inches or smaller.
(6)
Sounding information which, by the detail of data and proximity to classified
operating areas, could enable a potential enemy to determine the location of the
operating area should be given the same classification as that assigned to the
operating area. If the sounding information covers only a portion of the classified
operating area and a compilation of all such data does not define the limits of the
operating area more accurately than with in 30 nautical miles, then the sounding
information in question should be classified one level lower than the classification of
the operating area.
(7)
Any statement or inference that a particular oceanographic program exists for the sole
or primary benefit of a particular user may be classified and this should be considered
by managers when drafting program classification guides.
(8)
Sounding data and charts obtained from a foreign country as part of a bilateral
agreement will be classified IAW the terms of the agreement.
(9)
All other sounding information, charts, collection sheets, and other means of
portraying ocean depths not specifically classified above shall be
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