guardboat
nounUK /ˈɡɑːd.bəʊt/
US /ˈɡɑːrd.boʊt/
A guardboat is a small boat that keeps watch and protects an area of water.
The guardboat sailed slowly around the harbor all night.
RELATED WORDS
OTHER MEANINGS
2. A boat used to escort and protect other vessels.
A guardboat accompanied the fishing fleet back to shore.
3. A boat stationed to warn of danger or intruders.
The guardboat signaled when strange ships appeared on the horizon.
4. A small naval craft assigned to sentry duty.
The guardboat circled the entrance to the bay.