Sayonara Slipway is a historic boat ramp located within Sir David Martin Reserve, part of Yarranabbe Park on the shores of Rushcutters Bay in Sydney.

It forms part of the former HMAS Rushcutter naval precinct, a heritage site that also includes ramps, a sea wall, parade ground, drill hall, sail loft, cottage, and the Royal Australian Naval Sailing Association (RANSA) boatshed and slipway.

The surrounding parkland sits on land reclaimed in the 1880s, when a major public works project drained marshes, channelled a creek, and constructed a ballast dyke sea wall, with reclamation completed in 1883.

The slipway and its associated structures are recognised as part of the broader naval heritage of the site.