ship, boat
船 centers on watercraft: a ship or boat used for traveling or transporting goods across water.
船 combines 舟 (boat) with 㕣, which likely contributed the sound and originally depicted a valley or opening, together suggesting a vessel that travels along waterways.
A boat 舟 with a mouth-like opening 口 at the bottom, like a cargo hold or a speaking crew member, makes 船 a ship.
For セン, imagine a ship sending a signal: send -> セン, and the boat sends its message across the water.
ship; boat; watercraft; vessel; seaplane
balloon (toy or decoration)
ship's captain; skipper
pontoon bridge; floating bridge
fishing boat
sailor; seaman; seafarer
vessel; ship; shipping; seacraft
hull
shipbuilding
large boat
passenger boat
warships and other vessels
airship; blimp
sailing ship; sailing boat; sailing vessel
setting sail; putting out to sea
stateroom; cabin
trip by boat; sea trip; voyage; cruise
steamship; steamboat; steamer
ship's nationality; ship's country of registration
shipowner
surface mail (by ship); sea mail
the same ship; taking the same ship
ferry; ferryboat
seasickness