The sea chart is a nautical chart retrieved from the pockets of the Master fisher during the Deadliest Catch quest. The chart is used to determine the approximate location of Thalassus, a legendary sea creature that Jones suspects is terrorizing the waters and destroying fishermen's vessels.
Players are unable to make sense of the chart and only state "Hmmm.... That was probably the most confusing map I've ever read. I hope Jones can understand it." The chart, along with a giant harpoon and a rower, is one of the three items Jones wishes to gather before embarking on his expedition.
| NPCs | |
| Enemies |
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| Items |
 Harpoon plans Giant harpoon Sea chart Thalassus tooth Builder's tea Lowland heather Sea legs potion |
| Rewards |
 Small cast net Big cast net |
| Music |
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| Miscellaneous |
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