User's Manual

MIL-PRF-46374G

4.6.5.20 Human perspiration resistance types II and III. Watches shall be subjected to the

operating environment specified in 3.5.14.

4.6.5.21 Workmanship. Watches shall be inspected by visual and tactile means to ensure that

watches are continually produced in accordance with 3.7.

4.6.5.22 Operating instructions. The operating instructions shall be examined for conformance to

3.8.

4.6.5.23 Long term contamination (Qualification only). Ten watches, packaged in accordance

with 6.2 and held in storage for a period of not less than 90 days, shall be subjected to the test in

4.6.4.1 and shall pass the requirements in 3.6.2.

4.6.5.24 Long term accuracy (Qualification only). This test shall only be conducted on watches

submitted in conformance with 4.3 to determine compliance with 3.5.11. Each watch shall have

met all other conformance requirements and tests herein prior to being subjected to the long term

accuracy test. The test shall be conducted at 24.0 °C ± 1.7 °C (75 °F ± 3 °F) for a total running

time of 90 days, half of which time shall have been in a dial-up and half in a crown-down position,

alternated at 7-day intervals. In consideration of the normal work week of testing personnel,

testing need not be continuous. The mean daily rate for any “individual” watch shall meet the

accuracy specified in 3.5.11.

5. PACKAGING

5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the

contract or order (see 6.2). When actual packaging of material is to be performed by DoD

personnel, those personnel need to contact the responsible packaging activity to ascertain

requisite packaging requirements. Packaging requirements are maintained by the Inventory

Control Point’s packaging activity within the Military Department or Defense Agency, or within

the Military Department’s System Command. Packaging data retrieval is available from the

managing Military Department’s or Defense Agency’s automated packaging files, CD-ROM

products, or by contacting the responsible packaging activity.

6. NOTES

6.1 Intended use. Three types of watches are covered by this specification. Types I and II are

general purpose watches intended for use in low or no light situations. Type III watch is intended

for use by bomber pilots and navigators in low or no light situations on prolonged flights. The

intended use, available maintenance and storage of the watch will determine which type of watch

is required.

6.1.1 Military unique. The watch covered by this specification is military unique. It has the

unique military requirement of being able to be read after 8 hours in total darkness without any

intervention on the part of the user, for example, by the push of a button. No commercial

equivalent exists.