A monitor was a warship that was used heavily by the GLOCK during Der Lange Krieg . It is a warship about 90 by 50 feet. They were designed to be deployed from amphibious assault ships about 50nm from the assault point.
They have plentiful ammo stores and allowing the capability of sustained direct and indirect fire. They are armed with 30mm gatling guns, 5 inch guns, rocket pods, mortars, machine guns and tank cannons. They were as heavily protected as a main battle tank.
Due to their heavy armour and other defensive measures such as their low profile (no higher than 18 inches above the waterline when fully loaded), SAM's and sea-water cooled/away from hull exhaust will allow them to operate for hours on end even in the most heavily defended coastlines.
They were heavily compartionalized.