Admiral’s Coat

This beautiful +3 Green and Tan studded leather armor with a Yellow trim is covered in intricate scrollwork, and has a mantle bearing the skull and crossbones of the Liberators. Only those who have reached the rank of Captain, has command of more than one crewed ship, and has a Twilight Spelljamming Chair, can gain the magical benefits of the scrollwork. Otherwise, it is mundane studded leather armor.

Sealegs. Any attacks against you do not trigger effects caused by rolling a 20, and any critical hit against you becomes a normal hit.
Hide of the Titanium Kraken. You gain resistance to Bludgeoning and Slashing from non-titanium weapon attacks.
Oceanic Fortitude. When you are subjected to an effect that allows you to make a Strength or Constitution saving throw to take only half damage, you instead take no damage if you succeed on the saving throw.

If attuned, you gain the following benefits:

Soul of the Ocean. You have advantage on death saving throws at sea or in water, and are always under the effects of Air Bubble.
SkySwimmer. As a bonus action, you grow large white angelic wings that grant you a flying and swimming speed of 60 feet and last for 8 hours. Once this property is used, it can't be used again until you finish a short rest.
LandJammer. You can have your ship temporarily manifest a portion of itself as a part of the attack action on your turn, using the attuned vessel's weapons on a singular target. This can only be done if the vessel is crewed fully and if you are separated from the Spelljammer by more than 500ft. After the attack action of the vessel is completed, it can't be used again for 1d4 rounds.
Commanding Guidance. The amount of actions required to use your ship's weapons is reduced to one one action to fire, aim, load and reload them for your ship's crew.

 

Made from tough but flexible leather, studded leather is reinforced with close-set rivets or spikes.

Notes: Bonus: Armor Class, Resistance: Bludgeoning, Resistance: Slashing, Immunity: Critical Hits, by a liberator who has achieved Captain rank, Combat, Warding