Displacement: 16,000 tons full displacement Length: 170 meters Armament: x 2 660mm torpedo tubes X 18 660mm single-use torpedo chambers X16 Sail-mounted VLS for short-range Netfire missiles Crew: 15 officers, 120 enlisted Top speed: 26 knots Power Source: Advanced Submarine Reactor (made by subcontractors) Endurance: It’s a nuclear submarine. Price: $10 billion DPR: $10 trillion (customers who have purchased the DPR for the Stiletto-class submarine may purchase DPR for the Ryūgū-jō for $2.5 trillion only).
General overview: The Ryūgū-jō is an evolution of the previously-seen Estoc-class SSGN/SSBN, which is in turn a modification of the highly successful Stiletto-class advanced SSN. However, unlike those submarines, the Ryūgū-jō is not a military submarine.
The Ryūgū-jō dispenses with most of the weapons seen on the previous submarines, retaining only a minimum complement of weapons and allowing for a reduction of the crew count to only 80 men instead of 120. Instead of the vertical-launch missile launchers and the torpedo storage, the submarine houses a palatial compartment, 50 meters long and 3 floors tall, sufficient to house the owner in luxury.
Yes, we said owner
Because the Ryūgū-jō is not a military submarine.
It is an underwater, nuclear-powered, armed yacht.
While it retains the normal crew facilities already available on regular military submarines of the Stiletto and Estoc classes (such as the crew sauna and relaxation room), the owner’s section, designated the Master Suite, includes a separate kitchen, sauna, jacuzzi, and gym for the owner, as well as bedrooms sized for the owner and their immediate family and guests. Other luxuries may be fitted (your Master Suite is a size of a sizable house, except it is underwater).
The Multi-Mission Vehicle Compartment once used for special forces vehicles and underwater drones is retained (it is not part of the Master Suite) for the usual ‘rich people toys’ - diving equipment, inflatable boats, and the like. The roof is capable of docking with a smaller vessel or accepting helicopter resupply.
Armament: While most of the agreement has been removed to save maintenance, the Ryūgū-jō is armed with two 660 mm torpedo launchers, which can also be used to . Moreover, the Ryūgū-jō is armed with 18 sealed torpedo launchers within its hull sides, in three triple-tube launchers per side recessed into the space between the dual hulls. Those are armed at harbor and cannot be accessed by the crew during operations (and therefore do not require additional maintenance crew), however they can be used to deploy mines, fire torpedoes, or missiles that have been placed there, with the usual adaptations necessary to fire cruise missiles from torpedo hulls. A VLS launcher for miniature Netfire missiles and air defense missiles is placed in the sail.
Electronic Surveillance and Acoustic Countermeasures: The Ryūgū-jō[ is equipped with an electronic warfare support system mounted in the sail, for recording and classification of RADAR and electronic emissions (this, obviously, is mostly of use when the submarine is surfaced or at periscope depth, although not only), as well as equipped with a counter-torpedo system that launches small-sized torpedo decoys.
Furthermore, when surfaced, the Ryūgū-jō is capable of operating its SN/R-13 Submarine Radar, an AESA radar capable of tracking low-flying aircraft, missiles, helicopters, and surface vessels, a capability still judged necessary for the safety of the sort of client that would buy a personal submarine yacht. The submarine is also equipped with a blue-green laser receiver to receive communications from satellites while submerged.
Sensor systems: As all Eirin Maritime Shipyards submarines, the Ryūgū-jō is equipped with both a conformal active/passive sonar and a towed sonar array, as well as having the capability to use UUVs and ROVs for reconnaissance. It is equipped with an Argus-E supercomputer for signal processing.[/align]
by Allanea » Tue Mar 21, 2023 12:07 am 
