While originally released as a free pack on the Unreal Engine Marketplace, its availability has fluctuated. As of 2023, many users noted it was listed as "Not for Sale" or removed from the standard "Free" category. Epic Games has since been working on partially integrating these boats directly into the native Twinmotion Library. Twinmotion Boats Pack 1 in Epic Content - UE Marketplace

strikes the perfect balance:

The pack moves beyond simple floating boxes. It offers a curated selection of vessels ranging from small recreational dinghies to mid-range luxury cruisers, ensuring that no matter the scale of your project, you have the right boat to anchor your visual narrative.

When a user drags a boat from Pack 1 into the scene, they gain access to a new "Hydro Dynamics" tab in the object properties. This system utilizes Twinmotion’s particle and shader capabilities to automate realism.