Related Clues:

• Area of expertise for sailors
• Intricate patterns
• Nautical units
• They're all tied up
• Black stocking to darn after spinning delicate tissues
• Clove hitch and sheepshank
• Units of nautical speed
• Shoelace annoyances
• It's a measure of boat's speed that makes granny bow and slip
• Water rates of the Windsors, perhaps
• Nautical mph
• They secure the going rate, in the main
• Grannies, reeff etc
• They secure the normal shipping rate
• Are they tied to rates at sea?