From Guam in the Pacific to Puerto Rico in the Atlantic, from north of the Arctic Circle to south of the equator, the U.S. Coast Guard patrols and protects the world's largest exclusive economic zone, covering nine time zones.
It is one of the five military branches, a member of the intelligence community, a first-responder and humanitarian service, and a law-enforcement and regulatory agency that defends more than 100,000 miles of U.S. coastline and inland waterways.
On an average day, the Coast Guard's more than 56,000 personnel — operating on 243 Cutters, 201 fixed- and rotary-wing aircraft, and more than 1,600 boats — carry out 45 search-and-rescue cases, save 10 lives, seize 874 pounds of cocaine, perform 24 security boardings, screen 360 merchant vessels, do 105 maritime inspections, and assist the movement of $8.7 billion worth of goods and commodities in and around the U.S.
Below, you can see photos from a year in the life of the Coast Guard — where no day is ordinary:
27. The Coast Guard Cutter Polar Star cuts through Antarctic ice in the Ross Sea near a large group of seals as the ship's crew creates a navigation channel for supply ships on Jan. 16.
26. Coast Guard Petty Officer 2nd Class Richard Bacone from Maritime Safety and Security Team New York conducts a security sweep with his canine, Ruthie, during a Jan. 19 dinner cruise in Washington, D.C.
25. A Coast Guard MH-60 Jayhawk helicopter crew forward-deployed in Cold Bay, Alaska, surveys the area around the fishing vessel Predator prior to hoisting three people off near Akutan Harbor on Feb. 13.
24. U.S. Coast Guard ice-rescue team members training on Lake Champlain at Coast Guard Station Burlington on Feb. 17.
23. Boomer, the mascot of Coast Guard Station Crisfield, Maryland, sitting on the deck of a 45-foot Response Boat-Medium on Feb. 28. Boomer was rescued from a shelter and reported to Station Crisfield as the mascot in Dec. 2013.
22. A small boat crew aboard Coast Guard Cutter Dauntless prepares to get underway to pick up Mexican navy sailors for a partnership meeting in the Gulf of Mexico on March 11.
21. Coast Guard crew members prepare for a live-fire exercise during a Firearms Training and Evaluation-Pistol course at the Dexter Small Arms Firing Range at Coast Guard Base Honolulu on March 28.
20. Coast Guard Cutter Munro passes under the Golden Gate Bridge on its way into the Bay Area on April 6.
19. Sgt. 1st Class Chris Richards of the Connecticut National Guard along with U.S. Coast Guard Chief Warrant Officer Benjamin Jewell and Petty Officer 3rd Class Andrew Hayden of the Coast Guard Cutter Oak prepare a sling that will be used to hoist a 12,000-pound beached buoy, near Chatham, Massachusetts on May 9. The buoy broke free of its mooring off the coast of Maine during a winter storm and eventually washed ashore near Chatham.
18. The crew of Coast Guard Cutter Oak scrapes mussels off a buoy and shovels them back into the ocean off the Massachusetts coast on May 10.
17. U.S. Coast Guard Cutter Hamilton unloads about 18.5 tons of cocaine — worth $498 million — seized in 20 separate incidents in international waters in the eastern Pacific Ocean, at Port Everglades, Florida on May 18.
16. A family poses with Jane Coastie at the Intrepid Sea, Air, and Space Museum in New York City on May 29.
15. Petty Officer 2nd Class Lyman Dickinson, an aviation survival technician at Coast Guard Sector San Diego, is lowered into the water from an MH-60 Jayhawk helicopter during a joint search-and-rescue exercise with the Mexican navy off the coast of Ensenada, Mexico on June 7.
14. Belize, Trinidad and Tobago, and Dutch Caribbean Coast Guard members watch a member of the U.S. Coast Guard demonstrate a maneuver during a maritime law-enforcement training session for Exercise Tradewinds 2017 in Bridgetown, Barbados on June 7.
13. Steven Celestine, a member of the Commonwealth of Dominica Coast Guard, practices law-enforcement techniques during Exercise Tradewinds 2017 at the Barbados Coast Guard Base in Bridgetown, Barbados on June 9.
12. Chief Warrant Officer Matthew Rogers, from Coast Guard Maritime Safety and Security Team San Diego 91109, shows Naval Sea Cadets the MSST's armory during a tour of the MSST facilities on June 22.
11. Petty Officer 2nd Class Cory Stepien, a boatswain's mate at Coast Guard Station Eastport, navigates the northern coast of Maine in 29-foot rescue boat on July 26.
10. Petty Officer 1st Class Kim Nguyen, a health-service specialist aboard the Coast Guard Cutter Healy, gives IV training to a joint Coast Guard-Navy dive team and Healy crew members while underway off the coast of Alaska on July 27.
9. U.S. Coast Guard Cutter Eagle sailed into some foggy weather in Casco Bay during its arrival in Portland, Maine on Aug. 4. The arrival coincided with Coast Guard's 227th birthday.
8. Overhead view of Coast Guard Aviation Logistics Center in Elizabeth City, North Carolina on Aug. 11. The ALC is staffed by about 1,350 Coast Guard members and civilians who maintain aircraft from 25 different Coast Guard air stations.
7. Coast Guard members offload MH-65 Dolphin helicopters from an Air Force C-17 aircraft at Coast Guard Air Station Miami in Opa Locka, Florida on Sept. 11.
6. The crew of the Coast Guard Cutter Elm restores aids to navigation buoys in San Juan, Puerto Rico on Sept. 27.
5. Petty Officer 3rd Class Anderson Ernst uses a line-throwing gun to help pass the tow line to 65-foot fishing trawler Black Beauty, off the coast of New Hampshire on Nov. 11.
4. Petty Officer 2nd Class Brian Rodriguez, an aviation survival technician at Coast Guard Air Station Barbers Point, and Sung Jun Lee, from the Korean coast guard, hoist Oscar the dummy during a vertical-surface and self-rappelling exercise at Makapu'u Lighthouse, Oahu on Nov. 16.
3. Petty Officer 3rd Class Christopher Hale, an aviation survival technician at Coast Guard Sector Columbia River, demonstrates a rescue procedure to representatives from the People's Republic of China and the People's Liberation Army Southern Theater Command during the US/China Disaster Management Exchange held at Camp Rilea in Warrenton, Oregon on Nov. 16.
2. Crew members from Coast Guard Station Sand Key, Florida, take part in survival swim training on Dec. 8.
1. Coast Guard Lt. Jodie Knox, Sector Lake Michigan, and Coast Guard Petty Officer 1st Class Brian Wood, Pacific Strike Team, monitor the lifting of the Sailing Vessel Citadel near Red Hook, St. Thomas, U.S. Virgin Islands on Dec. 15.