Frederick Sound is a sound

Sound (geography)

In geography a sound or seaway is a large sea or ocean inlet larger than a bay, deeper than a bight and wider than a fjord; or it may be defined as a narrow sea or ocean channel between two bodies of land ....

 in the Central Coast of British Columbia

British Columbia Coast

The British Columbia Coast or BC Coast is Canada's western continental coastline on the Pacific Ocean. The usage is synonymous with the term West Coast of Canada....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

. it is the south arm and largest sidewater of Seymour Inlet

Seymour Inlet

Seymour Inlet is one of the lesser traveled 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 forms a maze of complex, narrow waterways and tidal pools...

 and along with that inlet was named in honour of Frederick Seymour

Frederick Seymour

Frederick Seymour was a colonial administrator. He served as the second Governor of the Colony of British Columbia from 1864 to 1866, and the first governor of the union of the two colonies, also named the Colony of British Columbia from 1866 to 1869.Seymour was the son of Henry Augustus Seymour,...

, second governor of the Colony of British Columbia

Colony of British Columbia

The Colony of British Columbia was a crown colony in British North America from 1858 until 1866. At its creation, it physically constituted approximately half the present day Canadian province of British Columbia, since it did not include the Colony of Vancouver Island, the vast and still largely...

. Frederick Sound has two inlets, one named Salmon Arm and the other unnamed. The complex maze of hidden waterways forming Seymour Inlet is in the region of Queen Charlotte Strait

Queen Charlotte Strait

Queen Charlotte Strait is a strait between Vancouver Island and the mainland of British Columbia, Canada. It connects Queen Charlotte Sound with Johnstone Strait, Discovery Passage and then to the Strait of Georgia and Puget Sound...

.

Frederick Sound should not be confused with Frederick Arm

Frederick Arm

Frederick Arm is an inlet on the South Coast of British Columbia, extending north from Cordero Channel between Lougborough and Bute Inlets.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 , after...

, which extends north from Cordero Channel

Cordero Channel

Cordero Channel is a strait in British Columbia, Canada, located between the mainland and Vancouver Island, among the Discovery Islands north of the Strait of Georgia. Cordero Channel runs north of Sonora Island, East Thurlow Island, and part of West Thurlow Island. Its eastern end connects to the...

 between Loughborough

Loughborough Inlet

Loughborough Inlet is one of the lesser principal inlets of the British Columbia Coast. It penetrates the Coast Mountains on the north side of the Discovery Islands archipelago, running about from its head at the mouth of the Stafford River to Chancellor Channel and Cordero Channel, which are on...

 and Bute Inlet

Bute Inlet

Bute Inlet is one of the principal inlets of the British Columbia Coast. It is 80 km long from its head at the mouths of the Homathko and Southgate Rivers to the continental headlands at its mouth, where it is nearly blocked by Stuart Island, and it averages about 4 km in width...

s.