A. Not without some extra gear. All GoPros have a waterproof rating that’s expressed as a depth; for example, most of them are rated as waterproof to ten meters, meaning you could swim about 30 feet down with your GoPro camera and it would still work. However, some users want to push those limits even farther, and for them, GoPro makes the “Super Suit,” a reinforced plastic housing designed to withstand water depths to 60 meters. If you’re shopping for equipment for deep-sea photography, plan on getting a Super Suit for your GoPro.
Most GoPro cameras can film in 4K (3840 x 2160), but older models are limited to standard HD (1920 x 1080). Premium models can film in 4K at higher frame rates like 60 frames per second (fps), which results in smoother, more realistic video. If you need superior 4K video quality, you’ll need to look at the more expensive GoPro cameras, but if you need great but not amazing video, you can save a decent amount of money by getting a prior-generation model that records in HD.
The reason I ask what you will be using it for is to determine which set of features you need. If you're going to be using it for simpler activities, don't go all out for a Black edition with a 60fps, 1080p cam (all HERO3's are 1080p, anyways). The reason the Black Edition is so expensive is because of the crazy quality it has, and if you're using it for a more simple basis I wouldn't worry about the difference. The Silver or even White is perfectly fine for you. The main difference between these two is the white's camera has a 5 megapixels with 3fps burst while the silver is 11 megapixels with a 10 fps burst -- is that worth $100 to you?
Ensure you can easily use your camera before purchase. This is an aspect many people overlook when getting a new GoPro, and it can cost them down the line. There are many bells and whistles tied to cameras. Though they might look great, you don’t want a model you aren’t able to operate. That does not mean you have to get the simplest model out there, but you should get one that is in your comfort zone.