Shadows can still cast underwater, so you could use a rock as a sundial or just how light it is at a certain depth.

I only saw a few people saying this, but buy a used car from anywtime-2012 max.

Make sure that car is in good shape, has been up to date on oil changes and was well taken care of. And if you wants some newer car features, adding in a newer stereo could do the trick.

But get used to learning how to fix your car because less cars will be made that meet your requirements. Meaning that if you don’t to sacrifice privacy for a new car when yours breaks down, be ready to fix it.