11.Marine-Infanterie-Division
History Formed 3.45 in Beverloo from the 2. Schiffs-Stamm-Regiment.

This Division is not actually mentioned in the Feldpostübersicht or in the Schematische Kriegsgliederung (The last entry there is 4.12.45).

If this Division was fully formed or not is an open to question, as the possibility is that this was actually a "false division" created to fool the Allies. A note from 3.22.45 might give some clues:

cover designation
(getarnt)
open designation
(offen)
11. Marine-Div. 2. Schiffs-Stamm-Rgt.
Abt. Kuffes Rgt. Kuffes auf Schouwen
Abt. Schindler Rgt. Schindler auf Goeree
Organization
General Compostion
Marine-Schützen-Regiment 111
Marine-Schützen-Regiment 112
Marine-Schützen-Regiment 113
Commanders Kapitän zur See Ahlmann 3.??.45 - 5.??.45
War Service

Never mentioned in the Schematische Kriegsgliederung