On more than one occasion, with no specified direction.
Once, with no specified direction and usually over an extended period.
- Once, with no specific direction, but usually over a shorter period.
- On one occasion, with a specified direction, with focus on the process.
- On one occasion, with a specified direction.
Popłynę is a perfective form, so it doesn't have a compound future tense, as it is already a future tense form.
But I call those verbs pseudo-perfective, because they don't necessarily denote a completed action.