ukrcavati

1. (with se) to board; to embark
   Putnici se upravo ukrcavaju na let za Pariz. — Passengers are boarding the flight to Paris right now.
   Na trajekt smo se ukrcavali skoro sat vremena. — It took us almost an hour to board the ferry.
2. (+ acc.) to load; to take on board
   Radnici u luci ukrcavaju kontejnere na brod. — Dock workers are loading containers onto the ship.

The direction takes u or na + acc.: ukrcavati se u avion, na brod; the perfective is ukrcati.