Related Clues:
- Nautical call
- ''Si, si'' at sea
- Shout on deck
- Sailor's OK, and a phonetic hint to this puzzle's theme
- "Yo!" asea
- It's shouted between decks
- Sailor's hailing call
- ''Roger,'' at sea
- Main attention-getter?
- Hi, sailor
- Ship-to-ship communication
- Call aboard
- Stern cry?
- Pirate's greeting
- Greeting to a matey