Related Clues:

• Number of vehicles
• Fast kind of armada?
• Fast as a group of ships
• Group of ships
• Naval force or collection of buses
• Group of vehicles operating together, ships say
• Swift like navy
• Group of aircraft, ships etc
• Group of aircraft, ships or cars
• Swift like naval force
• Group of ships, aircraft etc
• 'Fast, without delay (6)'
• Fast with 15 acrosses
• The first may be late
• Fast ships