Marine hazards include corals, jellyfish, sharks, and sea urchins.

Marine hazards include sharks, jellyfish, sea otters, dolphins, and even crocodiles, depending on the location.

There is a high risk of marine hazards (jellyfish, coral, and sea urchins) as well as traveler's diarrhea throughout the country.

Waterspouts have long been recognized as serious marine hazards and can be quite dangerous, posing threats to water craft, aircraft and swimmers.

After the IMTs were in place the trenches were backfilled and then a rock armour was placed over the top to protect the units against marine hazards, such as anchors or sinking vessels.

It includes the effects on the body of pressure on gases, the diagnosis and treatment of conditions caused by marine hazards and how relationships of a diver's fitness to dive affect a diver's safety.

Many solutions were proposed for how to determine longitude at the end of an exploratory sea voyage and hence the longitude of the place that was visited (in case one would want to revisit it, place it on a map, or more urgently, avoid known marine hazards).