How many letters does the top answer for “the act of passengers and crew getting off of a ship or aircraft” have?

The most common answer is debarkation (11 letters).

Crossword clue: the act of passengers and crew getting off of a ship or aircraft

2 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

debarkation 11 letters wn-def

the act of passengers and crew getting off of a ship or aircraft

disembarkation 14 letters wn-def

the act of passengers and crew getting off of a ship or aircraft

the act of passengers and crew getting aboard a ship or aircraft 75% similar → boarding, embarkation, embarkment