Frederick Arm is an

inlet An inlet is a (usually long and narrow) indentation of a shoreline, such as a small arm, bay, sound, fjord, lagoon or marsh, that leads to an enclosed larger body of water such as a lake, estuary, gulf or marginal sea. Overview In marine geogra ...

on the

South Coast of British Columbia , settlement_type = Region of British Columbia , image_skyline = , nickname = "The Coast" , subdivision_type = Country , subdivision_name = Canada , subdivision_type1 = Province , subdivision_name1 = British ...

, extending north from

Cordero Channel , image = Dent Rapids.jpg , image_size = 260px , alt = , caption = Dent Rapids, which flows east to west between the mainland coast and Sonora Island , image_bathymetry = Locmap-CorderoChannel ...

between Lougborough and

Bute Inlet , image = Bute Inlet.jpg , image_size = 260px , alt = , caption = , image_bathymetry = , alt_bathymetry = , caption_bathymetry = , location = Strathcona RD, British Col ...

s. Originally conferred with the name Ensenada del Estero by Spanish explorers Galiano and Valdes, its current name was given c.1864 by Captain Pender, RN (namesake of

Pender Island Pender Island ( Saanich: ) is one of the Southern Gulf Islands located in the Gulf of Georgia, British Columbia, Canada. Pender Island is approximately in area and is home to about 2,250 permanent residents, as well as a large seasonal popula ...

), after Staff Commander

Frederick John Owen Evans Sir Frederick John Owen Evans (9 March 1815 – 20 December 1885), was an officer of the Royal Navy. He became a distinguished hydrographer during his career and served as Hydrographer of the Navy. Biography Evans, son of John Evans, a master ...

, naval hydrographer,

British Admiralty The Admiralty was a department of the Government of the United Kingdom responsible for the command of the Royal Navy until 1964, historically under its titular head, the Lord High Admiral – one of the Great Officers of State. For much of it ...

. The name Estero survives in the vicinity in the form of Estero Basin, which lies between the north end of Frederick Arm and the south end of Bute Inlet and Estero Peak, on the south side of Estero Basin. "Estero" means "lagoon", while Ensenada de Estero means "Bay of the Lagoon". San Josef Mountain in the same vicinity was named for the ''San Josef'', a prize Spanish frigate that was captured by the Royal Navy and became part of the fleet Frederick Arm should not be confused with

Frederick Sound Frederick Sound (also called Prince Frederick Sound or Prince Frederick's Sound) is a passage of water in the Alexander Archipelago in Southeast Alaska that separates Kupreanof Island to the south from Admiralty Island in the north. Frederick So ...

, which is a sidewater of

Seymour Inlet Seymour Inlet is one of the lesser travelled of the principal inlets of the British Columbia Coast. Unlike larger inlets such as Knight or Bute, it is not flanked by mountains but by relatively low, but still rugged, coastal hill-country and form ...

in the area to the north of

Queen Charlotte Strait , image = Canadian pilot, near Port Hardy BC.jpg , alt = , caption = A pilot boat plies Queen Charlotte Strait near Port Hardy , image_bathymetry = Locmap-QCS-Hecate-Dixon.png , alt_bathymetry = ...

References

Inlets of British Columbia South Coast of British Columbia {{BritishColumbiaCoast-geo-stub