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New SDVs for RHN (AU).These designed to replace the old SDV H1 still in service with RHN Marines/Seals and Hellenic Army Amphibious Forces (not Seals,this special force unit belongs to the Army).Revealed in Defensys Excibition (AU) in 2006,these SDV are made by HDSS* from a special designed rubber/kevlar composite which do them almost impossible to detect with every known method for SDV detection.Not many details are revealed,but I can say that they use a very silent ducted slow-revving prop turning from advanced,high efficient electric motors providing three times the range of the H1.This means about 100nm/3.5kn (H1's range was 32nm/2.5kn).Operational crew is 2 in both variants and when the rear seats removed, this provides an additional load space.Just like the H1 the 'normal' load space is sideways in both sides of cabin.



*HDSS=Hellenic Sefense Systems Shipyard,a fictional part of Hellenic Defense Systems Organization from 1982,when a bankrupt shipyard was purchased.HDSS has designed and built the UFASC of Coastal Command,the Submercible boats of RHN and the FSV-65 stealth M-hull Patrol Claft,latter is the most advanced boat of its size built in HLK and the largest from composite materials.

Now some vehicles, the Tiger Family of Armoured Amphibious Vehicles(AU). Developed in late 1970's,the Tigers are also in service in Cyprus.First seen in Defensys 1980 exchibition, entered service in 1982 (4X4),followed by the 6X6 in 1988. Police variant (Tiger-P) entered service in 1990 and 8X8 in 1994.

Dimensions :(4X4,APC) 6.12m X 2.82m X 2.16m/(6X6,APC) 6.84m X 2.82m X 2.16m /(8X8,APC) 8.02m X 2.82m X 2.16m
Weight: 13.2t/16.8t/19.2t (Tiger-P 12.3t)
Towing : 4-8t
Ground clearance : 0.4m
Grade/slope : 70-75%/30% (grade with low gears engaged)
Engine : Diesel Steyr/ELBO WD615 6-in line, 8.1L (4X4) with 270hp, WD810 V8 10.9L 350hp (6X6), WD815 V8 13L 450hp (8X8)
Transmission: Morse 5X2 speed auto, 1.75:1 reduction gears for extreme off-road
Top speed : 105kph/60kph/12kph (road/off road/water)-governor 2600rpm
Crew/passengers : 2 (all)/(4X4) 8,(6X6) 10,(8X8) 14
Armour : Against 14.5mm all around, mines.
Construction :Monocoque steel frame,bulletproof front windows.Tiger-P has wired window protection against throwned stones and twin opening wired frames (feature copied from Yugoslavian BOV)
Suspension : Independent all round with internal transverse shock absorbers and coil springs activated with rods (known as "F1" suspension)
Fuel capacity : 2 X 220 lt (taken from Steyr 680 series)
Range : 1060 km (road,80kph)
Water propulsion : twin waterjets (also assistance by turning wheels)
Number built : 780 4X4, plus 200 Tiger-P, 400 6X6,240 8X8 (HLK), 400 (Akamas/Akamas-P, Cypriot built variant)

Note 1: E-105 Anti-Tank missile was co-developed with Israel, is similar with LAHAT and the AGL E-40H is a reverse engineered Mk19. Some Tiger have HK GMG instead of the E-40AGL.
Note 2:The Tiger 8X8/105 has a crew of 4 without passenger seats.Together with the AMOS variant, is not amphibious due to increased weight.
Note 3:Since 1990 all Tigers are painted with camo,which I will do in future.

Very nice work.
I assume they are mostly derived from VAB?

Yes,the Tiger has some relationship with VAB,but there are significant differences.For instance,rear door hinged down,so it opens like a ramp-a feature copied from the US M59-which also was in service then,allowing fast exit for passengers.Tiger carries more fuel from VAB, to increase range. VAB has twin props for water,while Tiger has waterjets.
This Morse/TAG 5-speed transmission is well known and common in HLK,because of wide use in buses (lisence made Mercedes/Volvo/ Steyr, even GMC),Tiger uses the Military Spec variant,with the reduction gears-absent in civillian units.

The design has nose similar with Chinese WZ-551.

Interesting. (Though I was mostly referring to the drawing itself, not to backstory )

The Iason Mk1 LST was developed to replace old US LSTs dating back to WW2.Designed after the 1974 Mediterranean War,the Iason Mk1 has an 127mm gun for fire support.The hangar was added in early 2000s,when all ships modernised.Load can be every vehicle Hellenic Army has,from G-wagen and Hummers to large Erevos TEL.The Ministry of Defense wanted maximum attained speed with full load 20kn and economical 18kn,so the shipyard went for a bow door similar with that of civilian ferries.Actually the Iason is the military variant of the Calydon V Rail Ferry of 1970.

you know ferry's have an completely different hull shape then landing ships, due to ferry's operating from deep harbours?
also, that thruster amidships make no sense, and I doubt you have space for those thrusters ahead with your limited hull depth over there.
the bow thrusters would fit if you had an regular ferry hull, but that would limit your grounding depth to about 5 meters, which would require the vehicles on board to still be amphibious. also, how is the bow door opening? to the sides or to the top? if to the top, I have doubts about the setups of the joints, there might be too much force on them (especially if the bow would be open while waves crash on the ship and maybe even the gun is firing)

I am also not entirely certain if the STIR 180 is the best fit, an STIR 120 is most likely enough and I have doubts if it works with the current search radar setup.

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If that thing has the bow of a commercial ferry then it won't be able to beach anywhere. If it has the hull of a traditional LST then it won't do twenty knots, no matter how much power you shove into it.
The USN built a twenty knot beaching LST, the Newport class. One look at it should tell you that a conventional setup isn't going to work.

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Source Materiel is always welcome.

And the Calydon V,the civilian cousin of Iason Mk1.The ship is fictional,however the name is real,because Hellenic Railways (OSE) did had rail ferries named Calydon (Καλυδώνα) from 1890-1950(named from an ancient city).These operated in Rio-Krioneri route,near the more famous Rio-Antirio (were also the famous brigde built,in Gulf of Patra).In my scenario Crete also has rail and by rail ferry trains come in Crete from Athens.When passenger,train is only Intecity and total time for Chania is 6.5 hours (includes 3 hours in the new ferry-an indigenous fast monohul design,named Calydon VII/VIII).

For those who do not know,rail in Crete is a long story,proposed several times but never built.In the real route,rail ferries on HLK were in service from 1890-2004,withdrawned due to the bridge-which in my scenario has a single rail in center.

Thiel got it right with the fast LST, but there is a second design that was worked out - It was the 2004 TSSE Project. It's a lot smaller in payload than what you are looking for, but it's an idea.

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