Editing Frederick Sound (section)

{{Short description|Passage of water in Alaska, United States}}
{{about|the sound in Alaska, United States|the sound in British Columbia, Canada|Frederick Sound (Canada)}}
[[Image:Five Fingers Light, Alaska, 1992.jpg|thumb|300px|View across Frederick Sound, to the [[Five Finger Islands Light]]]]

'''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 Sound was named by Captain [[George Vancouver]] for [[Prince Frederick, Duke of York and Albany]]. It was first charted in 1794 by two of his men, [[Joseph Whidbey]] and [[James Johnstone (explorer)|James Johnstone]].<ref name=Vancouver1801>{{cite book
  | last = Vancouver
  | first = George, and John Vancouver
  | title = A voyage of discovery to the North Pacific ocean, and round the world
  | publisher = J. Stockdale
  | year = 1801 
  | location = London
| url = https://archive.org/details/avoyagediscover00vancgoog}}</ref> The sound may also be known as the [[Russian language|Russian]] transliteration '''''Fridrikhe Zund'''''.

The sound is a popular location for watching whales in the summer and is busy marine passageway for both [[Alaska Marine Highway]] ferries and [[cruise ship]]s.

The sound is home to the [[Five Finger Islands Light]].