A Boat Lantern is a craftable Boat attachment in the Shipwrecked DLC. It requires a Science Machine to prototype and 1 Empty Bottle, 2 Twigs, and 1 Firefly to craft, and can be found in the Light Tab. It is also a reward from the Yaarctopus in exchange for Surf 'n' Turf.
The Boat Lantern needs to be attached to a boat to function. When it is attached to a Boat, it can be turned on or off at will, and provides light when turned on, protecting the player from Charlie. It has a limited durability and will eventually run out if kept on, but it can be refilled with Bioluminescence or Fireflies to extend its lifespan.
- The Slot Machine may occasionally drop Fireflies, turning it into a unreliable way to obtain Fireflies, if one has enough Dubloons and luck.
- If playing in a Shipwrecked world that has been connected with a base game world, Light Bulbs can be used to recharge the Boat Lantern.