User's Manual

MIL-PRF-46374G
6
TABLE I. Operating environment. - Continued
Environment Limits Duration
Altitude, types II and III Altitude of 10,700 meters
(35,000 feet)
60 minutes
Salt fog, types II and III Salt fog test Method 509.3,
MIL-STD-810
48 hours
Human perspiration
resistance, types II and III
Immerse watch in a saturated sodium
chloride solution containing 5 percent
by volume lactic acid (65 strength) at
91 °C ± 1 °C (196 °F ± 2 °F)
Air dry
Store in atmosphere produced by a 50
percent solution of glacial acetic acid
Instantaneous
2 hours
20 hours
Readability in total
darkness
After having been stored in total
darkness for 8 hours, and without any
intervention on the part of the user,
watch shall be readable in total
darkness
8 hours
3.4.8 Case markings. The back of the case shall be marked with the information shown in table II.
TABLE II. Case markings.
Item Descriptive title
Title and specification number WATCH, WRIST: GENERAL PURPOSE,
MIL-PRF-46374G
National stock number NSN
Amount of radioactive material MILLICURIES
Nuclear Regulatory Commission
manufacturer identification number
NRC MFR ID NO.
Contract number CONT NO.
Date DATE
Serial number SERIAL NO.
Manufacturer CAGE code MFR CAGE CODE
Note: The national stock number, contract number, and date may be applied without the
descriptive titles. The amount of radioactive material and the Nuclear Regulatory Commission
manufacturer identification number are necessary only if there is radioactive material present. The
marking of the month shall be the first three letters of the month and the marking of the year shall
be the year in full, e.g. April 2009 would be “APR 2009”. For type I class 3, types II and III class
3, and all class 4 watches, the date (month and year) shall be date of award of contract. For all
other watches, the date (month and year) shall be date of assembly. Only type I class 3 and all
class 4 watches shall be serialized. The serial numbers shall be assigned by the contractor. Serial