Your time training on Earth and the Flotilla has trained you for the harsh environments of the magical worlds, as well as proper customs and traits for the people who live there.  You gain the following benefits:

• You have advantage on Constitution saving throws against resisting the effects of a forced march, or from naturally hazardous conditions such as extreme heat, cold, or elevation.
• You gain proficiency with Weaver’s Tools.  Given proper materials and a set of Weaver’s Tools, over the course of a short rest you can create a set of commoner’s clothes or travelers clothes in the local style.
• You gain proficiency with Improvised Weapons.