New Horizons: Herakles International "Marlin Liner"
A basic multi occupancy personal use high speed submarine designed for the private sector, but also used as a military transport for admiralty. Designed for a large underwater colony, where several hours of travel underwater are a common occurence. Sleek, sexy and designed for rapid ascent and descent. Also, there are millitary versions which adopt a pair of forward and aft firing torpedo launchers. It has a long needle nose which is used to aid hyper-cavitation.