Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Ship/Yacht Collection 1 Free.
ShipYacht Collection 1 v1.0
This is a set of 13 yachts. All yachts share a texture atlas to reduce draw calls. Each yacht is around 500 triangles and is suitable for mobile devices.
Included is a 4096×4096 texture atlas, and also a 512×512 texture (w/ alpha channel) for the flags and antennas