Moreover, constructing a citadel is also very expensive. This is because the room has to be complete and thoroughly made to withstand any kind of weapon impact and should have the necessary equipments. For this reason, sometimes ship’s engine room is used as citadel to escape the pirates. Major shipping companies regard the expenditure of the anti-piracy stronghold as one of the biggest expenditures that they need to carry out. But the same level of expenditure when compared to the amount of ransom demanded by pirates appears to be very minimal. For this sole reason, many shipping companies have decided to go for the citadel especially in those ships which have a route that passes through waters where marine piracy abounds.