Logo, Symbol, Machine, Animal, Reptile, Snake, Emblem, Tire, Spoke, nautical, boat, vessel, sailor, boating, sea, ocean, sailors, marine, lifestyle, ship, shipping, half, full, needle, communicate, communication, control, pointer, glass, screw, dial
Half full is where this ship's control needle came to rest when it was finally retired from service, bringing to mind the phrase 'is the glass half full or half empty?'