1) Attention attractor 2) Attention getter, at sea 3) Attention-getter at sea 4) Bounty bellow 5) Bridge call 6) Briny greeting 7) Call aboard 8) Call at sea 9) Call for a mate 10) Call for the salt 11) Call from a cruiser 12) Call from a cutter 13) Call from a deck 14) Call from a yawl 15) Call from the bridge Found on https://www.crosswordclues.com/clue/ahoy
A·hoy' interj. [ Middle English a, interj. + hoy .] (Nautical) A term used in hailing; as, 'Ship ahoy .' Found on http://www.encyclo.co.uk/webster/A/47