Franco Banfi,Franco Banfi / Anchor on Wreck Vassilios T, Vis Island, Croatia, Adriatic Sea, Mediterranean

Ashley Cooper / Storm Gertrude, with winds of up to 132 mph resulted in this Trinity House 'Cardinal Mark' ripped off its steel anchor chain and washed up on Walney Island. England, UK. January 2016

David Fleetham / Bugis schooner, live-aboard dive vessel, at anchor in a limestone island lagoon, Uranie Island, Raja Ampat, West Papua, Indonesia.

David Fleetham / Panoramic view of live-aboard dive vessel at anchor in a limestone island lagoon, Uranie Island, Raja Ampat, West Papua, Indonesia.

David Fleetham / "Stella Maris Explorer" at anchor off Quiminatin Island, part of the Cuyo Archipelago just north of the Sulu Sea in the Philippines.

David Fleetham / "Stella Maris Explorer" at anchor off Quiminatin Island, part of the Cuyo Archipelago just north of the Sulu Sea in the Philippines.

Enrique Lopez-Tapia / Boats in Atlantic Ocean, Orango Island, Bijagos UNESCO Biosphere Reserve, Guinea Bissau, February 2015.

Franco Banfi / Boats moored in the village of Komiza, Vis Island, Croatia, Adriatic Sea, Mediterranean

Stephen Belcher / Anchor Island, Dusky Sound, Fjordland National Park, South Island, New Zealand

Rick Tomlinson / SY "Adele"'s first mate, Mark Thirkettle, cleans the anchor just off Huahine Island, French Polynesia

Rick Tomlinson / SY "Adele" at anchor near Danco Island in the Errera Channel, Antarctica, January 2007 Non editorial uses must be cleared individually.

Onne van der Wal / A fisherman's anchor lying in the sand, South Island, New Zealand.

Onne van der Wal / A fisherman's anchor lying in the sand, South Island, New Zealand.

Onne van der Wal / A fisherman's anchor lying in the sand, South Island, New Zealand.

Onne van der Wal / Antigua harbor and island with yachts at docks and at anchor.

Onne van der Wal / 88ft sloop "Shaman" at anchor in a foggy Kodiak Island inlet, Alaska. 2001. Property Released.

Onne van der Wal / Young family at anchor aboard a cruising yacht, Rhode Island. Children peering over the stern into the water.

Rick Tomlinson / Cruising yachts anchor off the island of Mayreau near Tobago Cays in the Grenadines, Caribbean.

Onne van der Wal / Cruise ship at anchor off Newport's Rose Island lighthouse, Rhode Island, USA.

Onne van der Wal / The yacht "Shaman" at anchor in Cobbler's Cove, South Georgia Island.

Onne van der Wal / A single yacht lying at anchor off a small island at sunset, Belize.

Onne van der Wal / The yacht "Shaman" at anchor in Cobbler's Cove, South Georgia Island.

Onne van der Wal / Young family at anchor aboard a Friendship 40 cruising yacht, Rhode Island. Model and property released.

Willem Kolvoort / Overgrown old anchor chain with hard corals, hydroid polyps and sponges at the drop-off of Astove reef, Astove Island, Seychelles, Indian Ocean

Willem Kolvoort / Overgrown old anchor chain with soft corals,hard corals and sponges at the drop-off of Astove reef, Astove Island, Seychelles, Indian Ocean

Willem Kolvoort / Overgrown old anchor chain with soft corals, hard corals and sponges at the drop-off of Astove reef, Astove Island, Seychelles, Indian Ocean

David Fleetham / Commercial hard hat diver wearing normal (non-wetsuit) clothing hauling hydraulic lines for a winch on the anchor device for a massive wave energy buoy off Kaneoho Bay, Oahu. The 40-kW experimental bu...