I assume that the submarine producer gives stats like empty weight from which the current weight can be calculated.

However, weight isn’t the important thing in a sub. It’s the weight to volume ratio, or buoyancy.

A sub sinks when buoyancy is negative and rises if the buoyancy is positive.

There are three common ways to achieve the changing buoyancy: the most simple one is a vessel with positive buoyancy adding droppable weights until the buoyancy is negative.

Other ways are a neutral buoyancy vessel that uses it’s engine power to push itself up or down. Or a vessel that can change it’s buoyancy by filling up tanks with water (to reduce buoyancy below neutral) and blow them out with air or other gases lighter than water (to raise buoyancy above neutral). A combination of several methods is also possible.

Unfortunately my hardware is too old to play games that are like that.

But I’ve noticed the same with mobile games. My policy is: if that single player game doesn’t start without internet access it gets deleted.

It propably grabbed the info off some random number-confusing dude like me, who recently posted the Earth’s diameter would be about 6 km instead of 6000.

Edit: oops, did it again. Meant radius, not diameter…

I hope I just had bad experience, but I have the aqua with backlight. About 2 years in, the display got terrible; hardly any contrast, especially in the edges. About 3 years in, the rubber buttons just crumbled away; so no more waterproof.

Can’t read anyways anymore, the contrast by now is like egg white on snow white. Didn’t mistreat, it was always stored dry and in no direct sunlight.