Continuity mistake: While the gang are trapped in the water, baby Sarah is sleeping soundly on the boat but her pacifier comes and goes.
Continuity mistake: The baby's appearance changes drastically. When we first see her, she doesn't have a lot of hair. Later, she has a full head of curly hair.
Other mistake: Although the sail is down, they never dropped anchor and the boat never drifts or changes location.
Suggested correction: The name of the movie is "Adrift" because they do drift. Maybe you didn't realise it since there were never any points of reference.
Since you suggested there is no point of reference how do you know the boat does drift.
Factual error: After the last of the crew is in the water, (girl with life vest goes in), a major land mass is seen not more than a mile from where the crew was left stranded. (00:24:00)
Suggested correction: There is no actual land mass shown after the girl with the life vest is thrown into the water. The land that is shown is from her memory as child.