Matemática — Inglês

The words "can" and "may" describes either the possibility or the capability of doing something. In the IMO Standard Marine Communication Phrases (SMCP) the situations where phrases using the word "can" or "may" appear make it clear whether a possibility is referred to. In an ambiguous context, however, misunderstandings frequently occur. What is correct standard phrase, from the IMO SMCP, that the ship engineer has to use to ask to the barge master if is it possible to start pumping oily water from the ship to a barge alongside?