To limit the probability that excessive movement, vibration or watercraft impact on, or mechanical damage to, the tanks or pumps will lead to failure of the tanks or pumps and associated piping, which could lead to the escape of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons.
To limit the probability of delays or ineffectiveness in conducting spill control or emergency response operations, which could lead to the escape and spread of liquid, which could lead to the ignition of vapour from a nearby ignition source, which could lead to harm to persons.