JOINT FLEET MAINTENANCE MANUAL

I-4F-3
COMFLTFORCOMINST 4790.3 REV A CH-5
(9) Equalize TDU with sea pressure through trim line. During conduct of the Deep Dive Test
Form on new construction submarines, the TDU Hull Valve will be cycled at depths specified
by reference (i) in order to meet material certification requirements. (see Note 3).
(10) Equalize sea systems and cycle hull and back-up valves as specified in reference (i).
(11) Repeat item 2.k.(10) of this appendix - Cycle main vents and check for binding.
m. After each deep dive, surface fully with EMBT blow from the depth required per the NAVSEA
approved EMBT Test Procedure and the approved Sea Trial Agenda. Check air bank pressures before
and after blow.
n. Additional requirements may be imposed at the discretion of the CO.
3. The following tests and evolutions will be carried out submerged following the deep dive:
a. Steering and diving operation at full speed. (see Notes 4 and 11).
b. Full power run. (see Notes 11, 12 and 13).
c. Steep angles - operate the ship through several depth changes using large up and down angles to check
operation of ship machinery. (see Notes 11 and 14).
d. Time raising each periscope and mast at maximum depth and speed for which they were designed.
Check training feature where applicable.
e. Run and observe air conditioning plants throughout trials. Operate the air conditioning plant to
demonstrate ability to carry entire maximum existing ship's air conditioning load, or 100 percent
capacity.
f. Run and observe refrigeration plant throughout trials.
g. Missile fire control erection performance tests (Vertical Launch System (VLS) on SSN).
h. Missile fire control alignment (VLS on SSN).
i. Missile tube muzzle hatch operation (VLS on SSN).
j. Missile compensation system operation submerged (VLS on SSN).
k. Additional requirements may be imposed at the discretion of the CO.
l. Comply with the CS/CCS test program with regard to firing of water slugs and testing of torpedo tubes.
(see Notes 3, 8 and 16).