Mark 3:9

And he spake to his disciples, that a small ship should wait on him because of the multitude, lest they should throng him.

Cross-reference

Mark 3:20 shows the crowd so large Jesus and disciples can't eat; this continues the same narrative of crowd pressure from v.9.

Mark 4:36 describes Jesus using a boat to leave the crowd; this fulfills the preparation in 3:9 where he asks for a boat ready.