Third mate
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A third mate (3/M) or third officer is a licensed member of the deck department of a merchant ship. The third mate is a watchstander and customarily the ship's safety officer and fourth-in-command. The position is junior to a second mate. Other duties vary depending on the type of ship, its crewing, and other factors.
The 3rd mate is often the ship's safety officer.
While a ship is underway, the officers navigate it, typically in three shifts or watches.
Avoiding collisions can be challenging in heavy traffic.
Demonstration of wearing a life vest for safety especially during on abandon ship.
Exxon Valdez oil spill
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The Exxon Valdez oil spill was a major environmental disaster that made worldwide headlines in the spring of 1989 and occurred in Alaska's Prince William Sound on March 24, 1989. The spill occurred when Exxon Valdez, an oil supertanker owned by Exxon Shipping Company, bound for Long Beach, California, struck Prince William Sound's Bligh Reef, 6 mi (9.7 km) west of Tatitlek, Alaska at 12:04 a.m. The tanker spilled approximately 10.8 million US gallons (260,000 bbl) of crude oil over the next few days.
U.S. Navy landing craft anchored ashore as numerous personnel position hoses during oil clean-up efforts on Smith Island on May 11, 1989
The Exxon Valdez a few hours after she ran aground.
During the first few days of the spill, heavy sheens of oil covered large areas of the surface of Prince William Sound.
Beginning three days after the vessel grounded, a storm pushed large quantities of fresh oil onto the rocky shores of many of the beaches in the Knight Island chain. In this photograph, pooled black oil is shown stranded in the rocks