Yes they can work underwater. Most come with water proof coating or ceiling inside of their products so they don't get their circuits fried from the water.
a marine biologist can work wherever the hell there is water
For the most part, marine electronics are waterproof. You can find great deals on waterproof marine items by visiting http://www.bizrate.com/marine-electronics/waterproof-radio/ or even amazon.com.
When shooting film underwater, such as in a scuba diving expedition, the brand of electronics or type of camcorder you are using that is the most important piece of equipment. The camcorder housing, which prevents the camcorder from getting wet, is essential. Housings are available from Gates Underwater Products or Amphibico.
Marine biology is the study of underwater creatures.
Marine electronics are best used for items that would be ruined if used in or near salt water. Marine electronics are almost always waterproof, as well as water resistant.
underwater geography
no
Marine biology is the study of underwater animals. So if you were gonna be a marine biologist your job would be to study sea creatures. There is also marine ecology which is the study of coral reefs and underwater habitats.
No, a marine biologist usually analyzes marine life and animals; whereas, an oceanographer studies the layout of the ocean, such as underwater ridges, underwater volcanoes, etc.
underwater photographer is someone who takes pictures of the marine life underwater and around the waters edge.
a bacterium that lives underwater
The International Marine Contractors Association represents those engineering companies that operate in the marine environment, offshore and deeper underwater. This includes diving and surveying work in particular.