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Old 02-14-20, 11:17 AM   #7
GreyLynx
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Join Date: Mar 2019
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Test 3:
- Negative tank full (4.5 m³)
- Trim tank set for Neutral Buoyancy (9.15 m³)
- Electric Engines at Full Speed, Dive Planes Down. Start timer.
- Fill MBTs (100 m³)
- Total Ballast = 113.65 m³ (same as Test 1)
- Depth of 15 m reached. Stop timer: 32 sec.

In Test 1 and 3, the same Negative Force (4.5 tons) is applied, but in Test 3, Negative Buoyancy is reached sooner because the Negative tank is already filled up at the start.

Historically, this is how it was done ("Diving Regulations for U-boats" document, Section VII).

But Hey, I once met an XO who told me: "There's the Right way, there's the Wrong way, and there's the Navy way; but on MY ship, you do it MY way!". "Aye Aye Sir".
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