Related Clues:

• Semilunar valve neighbor
• Toward shelter, nautically
• Protected, in a way
• On the safe side, at sea
• On the quiet side?
• Toward one side of a ship
• On the sheltered side
• Main bloodline
• Wheelhouse direction
• Central artery
• Bloodline
• Blood line
• Toward shelter
• Nautical adverb
• Lane in the main