[header] How to urinate in the ocean discreetly [title] Make sure that there are no people close to you. [step] If there are some swimmers close by, move away from them. Even if they don't see you do your business, they may feel the sudden warmth and become suspicious. 
Move to the left or right, instead of deeper into the ocean. [substeps] Do not go so far away that you can no longer see or hear other people.