increasing battery life

[anthrax]

Well, according to the US Navy's

SUBMARINE TORPEDO FIRE CONTROL MANUAL, Date May 1950

The fleet type submarine. Which I guess it gato,balao, or trench class has the following performance.

310. FLEET TYPE SUBMARINE:

(a) The Fleet Type Submarine will make the following speeds submerged for the length of time indicated, if it starts with a full battery charge:
Knots Time
3.0 48 hours
6.0 3 hours
8.0 1 hour
9.0 1/2 hour


(b) Thus it can readily be seen that a major consideration when making an approach is conservation of the battery capacity.

....

[quote]
320. THE GUPPY II TYPE SUBMARINE:

(a) The Guppy II Type of submarine has characteristics different from the Fleet Type. The primary difference is submerged speed. The Guppy II will make the following speeds for the time indicated with a full battery, charge:
Knots Hours
4.3 48
5.3 36
6.3 20
8.2 10
9.4 6
9.9 5
11.8 3
15.7 1
17.8 30 minutes
[/qoute]