Gentlemen!
In early 1970-th British SRN6 hovercraft was tested as close support with four variants of armament installation. They were 2 type of 40mm US grenade launchers, ATGM “Swingfire” and 81mm mortar.
I have an idea about how were mounted Gls and ATGM. But nothing about mortar mount. Have anybody any idea about it?