The bulk update request #2525 is pending approval.
create alias boat_wheel (10) -> boat's_wheel (0)
create alias ships_wheel (6) -> ship's_wheel (0)
create implication boat's_wheel (0) -> watercraft's_wheel (0)
create implication ship's_wheel (0) -> watercraft's_wheel (0)
Reason: https://en.wikipedia.org/wiki/Ship%27s_wheel
says "A ship's wheel or boat's wheel is a device used aboard a water vessel to steer that vessel ..."
Suggest boat's_wheel and ship's_wheel be different tags because a
1) a boat is a SMALLer watercraft (https://en.wikipedia.org/wiki/Boat says "A boat is a watercraft ... generally smaller than a ship,"
2) a ship is a LARGE watercraft (https://en.wikipedia.org/wiki/Ship says "A ship is a large watercraft that travels the world's oceans and other sufficiently deep waterways, carrying cargo or passengers"
***
Both boat and ship imply to watercraft.
Also, e621 aliases have boat tag separate from ship tag
boat tag: tags that alias to boat : row_boat, rowing-boat, pleasure_craft, rowingboat, row-boat, pleasure_boat, narrow_boat, rowboat, rowing_boat, and narrowboat
ship tags: tags that alias to ship: pirate_ship, woodship, naval_ship, wooden_ship, viking_ship, and wood_ship