Possible Clues:

• Right angles to the keel
• Crosswise on a ship
• Crosswise, at sea
• A smile going from one side to the other
• Abraham briefly and vacantly crossing a ship's deck
• Each intercepting missile is at right angles to vessel
• A series of radar impulses across the deck
• At right angles to the ship's keel
• To the right or left of the centre of the ship