Related Clues:

• Balance on board, say, accepted by catchers of fish
• What a good sailor has
• Stability on board ship
• Swell accommodation!
• Give ova protection orally, for resistance to sickness
• Sailors should find them, for example, in marine mammals
• In the main people find them a steadying influence
• In the main one finds them strangely ageless
• Eagles fly South and sailors soon get them
• Sailor's requirement to listen to view on stages
• In the main, they provide support
• Members with ability to survive rough voyages
• Sailors make steady progress on them, say, among swimmers
• What landlubbers lack
• Sailor's ability