CFAV Glendyne (YTB 640) is a Glen-class naval tugboat operated by the Royal Canadian Navy.

It was built at Yarrow Shipyard in Esquimalt, British Columbia.

The ship was launched in 1975 and delivered on 8 August 1975.

Attached to Maritime Forces Pacific, the ship is based at CFB Esquimalt.

This article about a specific military ship or boat of Canada is a stub.