There's a similar concept in the Battletech universe. The Lowyfur, a Wyrm-class submersible SDS, evaded capture for 5 years after the liberation of Terra, conti

There's a similar concept in the Battletech universe. The Lowyfur, a Wyrm-class submersible SDS, evaded capture for 5 years after the liberation of Terra, continuing to prowl the oceans and inflict Blakist terror. https://www.sarna.net/wiki/Wyrm_SDS_Submersible_Fortress https://www.sarna.net/wiki/Wyrm_SDS_Submersible_Fortress