Oh I'm sorry I didn't realise asking and listening were pariahs. Interesting new rules on debate, learning and decision making you having going there.
How big is the area of sea that has to be patrolled as it is under risk from pirates?
How many pirate attacks last year?
How many vessels are potential targets?
How many (coordinated) resources are available to police & protect this area & number of targets?
How long is the coast from which pirate attacks can be launched?
Lets try with a bit of thinking instead of hoping the Russians come along and blow stuff up for us eh?