Requires: Navigation or Cartographer's tools proficiency
Navigation is the overarching term for anything involving maps, navigating the seas, as well as understanding and utilizing log poses. A good Navigator knows the seas well enough to be able to traverse their crew through storms, set up log poses to get to different islands. With this downtime activity, a navigator will be able to map islands, construct log poses, and prepare a crew for travel.
The "Navigation Prep" and "Log Pose Attunement" segments of this downtime activity are mostly intended for travelling through the Grand Line. The "Mapping" segment is generally used, but for the most part, a Navigator will truly shine throughout Paradise and the New World.
Mapping an Island
While you are on an island, you can spend 3 DT to begin mapping the location. The goal to mapping is to complete the Map Goal (MG). Each island, depending on where it is set (Blues, Paradise, New World), has a Map Threshold. In the Blues, the threshold is 100. At Paradise it is 200, and in the New World it is 300. Make a Cartographer's tools check, adding your proficiency bonus, and add the total to your progress in completing the threshold. When the threshold is complete, you are considered having completed the entirety of the map. You gain the benefits listed below for that island. Some islands may be unable to be mapped, such as some of those found in Paradise and the New World, due to their ever shifting landscapes. You can find which islands are banned from mapping in the island's channel.
Benefit for Meeting the Threshold
While this map is on your person, you know the secret patterns and flow to the island and can find passages through that others would miss. When you are not in combat, you (and companions you lead) can travel between any two locations in the island twice as fast as your speed would normally allow. You gain a +2 bonus when making Wisdom (Navigation) or Wisdom (Survival) checks or Navigator's tools checks within the island.
Log Poses
Utilizing the Navigation DT allows you to both attune Log Poses to islands for travel.
Attuning a Log Pose
While in Paradise, while you have a Log Pose in your possession, you can attempt to attune it to the current, next closest island, or next three closest islands to you. To attune a Log Pose, you must spend 4 DT and make a Wisdom (Navigation) check. This navigation check goes towards the Log Pose's attunement threshold. Once the threshold is reached, it will begin to point in the direction of the island, or islands that it has attuned to.
Single Needle Log Pose
A Single Needle Log Pose is intended for Islands within Paradise, the attunement threshold for a Single Needle Log Pose is 100. Once a Log Pose of this type is newly attuned, you can travel to either the prior or next island beside the island you are currently on.
Triple Needle Log Pose
A Triple Needle Log Pose is intended for Islands within the New World, and while they will work in Paradise, are ultimately pointless to use. The attunement threshold for a Triple Needle Log Pose is 300. Once a Log Pose of this type is newly attuned, you can travel to the prior island as well as the two islands beside the island you are currently on.
Eternal Log Pose
An Eternal Log Pose can be used in both Paradise and the New World, but can only be used in attunement if you carry an "Unattuned Eternal Log Pose". The attunement threshold for an Eternal Log Pose is 500. Once a Log Pose of this type is newly attuned, you gain advantage on Travel Checks made to travel to this island from anywhere in the world.