A purchasable ship such as the 'Needlefish' that can be loaded with land vehicles from the carrier, and can be used to move them faster across the map.

This watercraft will improve the ability to conduct assaults on islands remotely and will prove to be the watercraft equivalent of the "Petrel" aircraft.

The vehicles would be loaded similarly to how you load a vehicle normally to a carrier through the "Vehicle Control" panel, And could be unloaded by waypoints like the "Petrel".

The watercraft will be unarmed and would allow only 2 vehicles to be loaded

Certain land vehicle functionalities should be active on the watercraft, such as radars and weapons, allowing it to be less fragile while carrying them.

The loaded vehicles weight's should also effect the watercraft speed.

With my experience, I never use land vehicles for attacking purposes as aircrafts are a lot more accurate and a lot more mobile.

Because the land vehicles are very slow and have insufficient fuel to make long distance travel on water, The carrier must be close to the target island in-order to unload the vehicles and have them attack the island at a reasonable pace. And in this situation, the carrier is usually within weapon range; and I would usually prefer to use the naval gun as it is far more efficient in taking downs any enemy.

In the game, I always see a better alternative than using land vehicles, except with Virus Modules as they are only available for land vehicles. Having these landing crafts would allow attack operations to be conducted outside the range of the carrier, making land vehicles actually serve a huge role.