The Daisy Lee is a container ship in Grand Theft Auto V, the ship is a small to medium sized container ship docked at Terminal, Los Santos. Trevor Philips was required to steal a Submersible from the Daisy Lee in order to prepare for The Merryweather Heist.
The ship's color is green and red and the port of registry is Pumpherston. It is unknown if Pumpherston is an international place or within the United States. Pumpherston is a real place in real life located in Scotland but it is unlikely this is the ships home port because Pumpherston is not located near water. Pumpherston is never mentioned or seen in any game other than GTA V on the ship. Since Rockstar North is a Scottish company, Pumpherston is probably based on the Scottish location.