The Marine-SA was the naval part of the SA. It was responsible for the naval training of SA-members and during the war it also recruited and trained members for service with the Kriegsmarine.
All SA-Gruppen had at least one Marine-SA unit and they were numbered 1 - 401.

The Marine-SA in Danzig took part in the campaign in Poland 1939 when it assisted the Wehrmacht in capturing the port of Gotenhafen (Gdynia).