A member of crew will meet you in Puerto Lindo on the morning of departure. Most people arrive by specially arranged group transport (25USD per person) which will take you directly to the meeting point. Passengers arriving independently will be given instructions where and when to meet.
After a trip briefing the captain will collect passports. Everyone will board the boat early afternoon before setting off at around 2pm. The boat should arrive in San Blas during the evening and anchor overnight.