Secret Naval Projects

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Unbuilt and cancelled ships, subs etc. Designs that never made to production.
overscan (PaulMM)
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Hood
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M. A. Rozon
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flateric
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TinWing
Early Post-WWII Dutch Submarines: Unbuilt 3 and 4 pressure hull designs
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klem
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Nautilus 100,New Submarine concept .
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576
TomS
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ptdockyard
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Hood
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R
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Venezuelan warships to be built by Dutch shipyards in 1950s
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235
Roodbaard1958!
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SSN (X) - Seawolf Redux or something far larger?
2
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aonestudio
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"Ultimate battleship" designs
2
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73
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Hood
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icyplanetnhc (Steve)
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US Navy 18" gun battleship design: BB61 "slow" scheme from April 1938
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3
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587
icyplanetnhc (Steve)
icyplanetnhc (Steve)
Tzoli
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Royal Navy Lion Class Battleship series 1938-1945
2 3 4
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122
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BDF
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Grey Havoc
2025 Unmanned Cargo Ships program (Japan)
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14
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muttly
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covert_shores
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Unbuilt Russian special mission submarines
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18
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publiusr
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The Mysterious 1944-45 Gibbs & Cox Battleship
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Huntington Ingalls LPD Flight II
2
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50
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jsport
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UAV and UCAV carrier designs
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22
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shin_getter
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Zumwalt Destroyers
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15
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Forest Green
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Type 4X Destroyer
2 3 4
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153
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Royal Navy XLUUV program (Manta-class drone submarine)
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3
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Forest Green
F
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Iowa and Alaska Class Conversion Projects
5 6 7
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278
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80K
isayyo2
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Grey Havoc
Medium Unmanned Surface Vehicle (MUSV), U.S. Navy
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26
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6
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860
alexi
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Tzoli
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6
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Archangel06
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covert_shores
Unbuilt Royal Navy submarines
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30
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RLBH
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Triton
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Izumo Conversion to a Full Scale Carrier
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86
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Kota
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never build japanese aircraft carriers
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62
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Tzoli
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UK 1975 Hydrographic Study Group
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4
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297
RLBH
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WANX
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321
Tzoli
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robinbird
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13
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729
Schneiderman
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49
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196
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2
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71
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2
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58
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P
K
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35
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shin_getter
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20
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27
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bobbymike
bobbymike
T
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Mystery "submarine"
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5
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Iron Felix
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Triton
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DCNS Gowind
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19
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H_K
H
A
Unbuilt battleships of the 1940s
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12
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12K
EwenS
E
JAZZ
Russian and Soviet Aircraft Carriers
7 8 9
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354
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181K
uk 75
uk 75
sferrin
U.S. Navy Typhon Warships
2
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48
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uk 75
uk 75
covert_shores
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Unreported Low-Observable Warship From Iran (new catamarans)
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14
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2K
jsport
J
Grey Havoc
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Border and Offshore Submersible Sentry (BOSS) - Russia
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29
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2K
supergaleb
supergaleb
Hood
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Arctic Drift Barge
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0
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355
Hood
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Triton
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Cruiser Baseline (CGBL)
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27
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18K
muttly
M
Grey Havoc
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National Security Multi-Mission Vessels (NSMV)
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1
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1K
jsport
J
J
Verdun French Aircraft Carrier (images)
2
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66
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C
JFC Fuller
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7 8 9
Replies
357
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96K
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JFC Fuller
F
French Aircraft Carrier Never-Were Designs and Proposals
2
Replies
50
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BlackBat242
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covert_shores
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Stealth submarine shaping - Type-212CD, etc
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6
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1K
kagemusha
kagemusha
Hood
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Australian AOE Replenishment Ship HMAS Protector
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12
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4K
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Grey Havoc
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Canadian SSN requirement 1987-89
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27
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Archibald
A
GTX
BAE Systems Submarine Concept
2
Replies
45
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AAI Common Unmanned Surface Vessel
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10
Views
8K
Forest Green
F
flateric
Lockheed Sea Shadow
2
Replies
59
Views
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RP1
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T
  • Locked
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Replies
27
Views
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kaiserbill
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PD-214 Security Class Maritime Administration conceptual mobilisation ship 1974-1981
Replies
1
Views
369
A Tentative Fleet Plan
A Tentative Fleet Plan
Triton
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8 9 10
Replies
378
Views
108K
TomcatViP
T
Tzoli
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11
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2K
Dilandu
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Tzoli
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Pre-PLAN Chinese Warship Projects
3 4 5
Replies
182
Views
12K
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Triton
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Replies
25
Views
9K
Dilandu
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covert_shores
Russian 'Status-6' nuclear attack system
3 4 5
Replies
193
Views
46K
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Multirole Combat Ship 180 (MKS 180, formerly K131)
Replies
13
Views
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jsport
J
R
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Type 346 radar speculation
Replies
4
Views
836
ricebunny
R
Grey Havoc
USN 'Ghost Fleet' Large Unmanned Surface Vessel (LUSV)
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31
Views
7K
shin_getter
shin_getter
Triton
US Navy KAPPA submersible craft
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3
Views
6K
NMaude
N
N
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Styx Platforms
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1
Views
639
Grey Havoc
Grey Havoc
S
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panzerschiff concept
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34
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5K
Roodbaard1958!
R
Grey Havoc
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Royal Hellenic Navy
Replies
4
Views
886
Grey Havoc
Grey Havoc
sferrin
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Chinese Nuclear Powered Icebreaker Project
Replies
22
Views
5K
Grey Havoc
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Triton
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Arleigh Burke Class Concepts
2 3
Replies
89
Views
28K
A Tentative Fleet Plan
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archipeppe
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The Real Sparviero Aircraft Carrier
2
Replies
67
Views
10K
archipeppe
archipeppe
ptdockyard
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Development of the Italian Comandanti Medaglie d'Oro-class destroyers
Replies
1
Views
441
mircomazzetti
M
Grey Havoc
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European Patrol Corvette (EPC)
Replies
15
Views
4K
Phoenix_jz
P
K
Novorossyisk modernization
Replies
22
Views
2K
Antonio
Antonio
Arjen
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OSGA-25 hydroplane catamaran
Replies
0
Views
334
Arjen
Arjen
trajan
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Sir George Thurston cruiser designs Type A,B,C
Replies
2
Views
585
Hood
Hood
RP1
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2
Replies
67
Views
15K
uk 75
uk 75
R
Development of Project 11442M Admiral Nakhimov - Kirov
Replies
17
Views
986
Tzoli
Tzoli
N
Chinese hovercraft
Replies
11
Views
4K
Arjen
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Triton
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ROC Navy - Taiwan - Future Guided Missile Destroyer - NCSIST
Replies
7
Views
3K
Ainen
A
I
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CA-134 Des Moines-Class Heavy Cruisers - 1980's Reactivation Proposals
Replies
37
Views
2K
Firefinder
F
Triton
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US Navy CONFORM submarine
Replies
7
Views
14K
Grey Havoc
Grey Havoc
Grey Havoc
Future Littoral Strike Ship (FLSS)
Replies
20
Views
4K
Hood
Hood
Michel Van
Cold war Submarine Aircraft Carriers Projects.
2 3
Replies
113
Views
79K
fightingirish
fightingirish
4
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USN 10"/50
Replies
3
Views
608
40902nd
4
RyanC
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US Navy/USMC/US Army Sea Basing Concepts
Replies
37
Views
21K
publiusr
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