Self bailing means water will drain out of the boat on its own accord
through openings in the transom, usually at deck level or just above it.

In practice this means that if the boat is balanced properly (not down
at the bow), rainwater will drain out on its own accord if the boat is
at anchor or tied up at a marina, and, if you are running and take on
some water, it will drain out these same openings without your having to
do anything.

In that case, the very low freeboard in the stern and those two one-way
valves in the stern should be a part of the self-bailing feature in my
boat assuming that the boat is balancing properly (and it is). Thanks.

Some older Makos had a deck flush with the cut out of the transom
opening. Any water that came aboard will whoosh right out.

No, my boat is not like that.

Most boats nowadays that are self-bailing have round or
rectangular transom openings to allow water out. Do not
block these in any way.

My boat has two round openings at the transom flush with the deck to
allow water on the deck to drain out. And No I will not block it. I
will clean them and remove any fallen leaves in that area.

Thanks for the confirmation.

Jay Chan