Limitation of liability under this Part shall not apply to the following claims—
(a) claims for salvage or contribution in general average;
(b) claims by servants of the shipowner or salvor whose duties are connected with the ship or the salvage operations, including claims of their heirs, dependants or other persons entitled to make such claims, if under the contract of service between the shipowner or salvor and such servants the shipowner or salvor is not entitled to limit his or her liability in respect of such claims, or if the shipowner is under such contract only permitted to limit his or her liability to an amount greater than that provided for in section 421;
(c) claims in respect of air-cushioned vehicles and floating platforms constructed for the purpose of exploring or exploiting the natural resources of the sea-bed or its sub-soil.