I may have a little bit of OCD.
I started out researching the Portuguese Neptunes, but as I came upon more and more information, I started gathering data about more and more variants of the Neptune, eventually encompassing all variants used by foreign countries (and the P2V-4).
The following is the sum total of my research, as close to reality as I could discover. Firstly you have the characteristics and loadouts of each version, and then you have the versions each country used, with the corresponding database numbers (referred to as DB#).
In that list, I took the liberty of reassigning some numbers when a certain country had too many entries for the versions it had fielded and the other had not enough.
In other cases, the reassigned numbers were of "fictitious" entries: Chile never fielded the Neptune, and France never fielded the P2V-5 (though it fielded the P2V-6 and the P2V-7), so I reassigned those numbers.
I hope you find this research useful!
Enjoy!
KA-17 Panoramic Camera
- Currently the KA-17 is only capable of Surface Search. It should also have Ground Search (Fixed) and Ground Search (Mobile).
AN/APS-20
- From page 141 of the P2V-5F Flight Handbook (page 167 of the pdf file):
“As a search radar, it can detect a small aircraft (…) up to 65 miles, a medium sized plane (…) up to 85 miles, or a ship the size of a destroyer at (…) 200 miles.” (I do not know if they mean nautical miles or regular ones, though.)
- From page 147 of the P2V-5F Flight Handbook (page 173 of the pdf file):
“The AN/APS-20 radar is (…) capable of scanning through 360 degrees for a map type presentation of land masses, ships, and aircraft.”
- Considering the above, the AN/APS-20 radar should have “Air Search” and a 360 degree coverage.
- In earlier versions, the AN/APS-20 was capable of search, but not of targeting. That is why the P2V-4 and early versions of the P2V-5 had an AN/APS-31 radar installed, for air-to-ground and air-to-air targeting and ranging.
Sources:
http://www.avialogs.com/index.php/en/ai ... craft.html
http://www.avialogs.com/index.php/en/ai ... craft.html
P2V-4 (P-2D) Neptune
Sensors:
Search Radar: AN/APS-20A
Targeting Radar: AN/APS-31
Radar bombsight: AN/APA-5A
ESM: AN/APR-9 with AN/APA-69 direction finder and AN/APA-64A signal analyser
Searchlight (70*10^6 candles)
Armament:
Has solid nose with 6 forward-firing 20mm M24 cannons, twin 20mm M24 cannon tail turret and twin 12,7mm M2 Browning machinegun deck turret
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 16 HVAR rockets under the wings
Can carry up to 4 Mk. 24 or Mk. 34 torpedoes
Can carry up to 6 500 lbs. bombs/mines
Can carry up to 4 1000 lbs. bombs/mines
Can carry 2 1600 lbs./2000 lbs. bombs/mines
Fuel:
Permanent: 3000 USGal
Wingtip tanks: 600 USGal
Bomb bay tanks: 700 USGal (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
 
Suggested loadouts (P2V-4):
Maritime Surveillance
- 2 350 US gal bomb bay tanks
ASW
- 4 Mk24/Mk34 torpedoes
- 30 AN/SSQ-2B sonobuoys
ASW, long-range
- 2 Mk24/Mk34 torpedoes
- 1 350 US gal bomb bay tank
- 30 AN/SSQ-2B sonobuoys
Surface Attack, 500 lbs
- 6 500 lbs M64 GP bombs
- 16 HVAR rockets
Surface Attack, 1000 lbs
- 4 1000 lbs M65 GP bombs
- 16 HVAR rockets
Surface Attack, 2000 lbs
- 2 2000 lbs M66 GP bombs
- 16 HVAR rockets
Surface Attack, 500 lbs, long-range
- 3 500 lbs M64 GP bombs
- 1 350 US gal bomb bay tank
- 16 HVAR rockets
Surface Attack, 1000 lbs, long-range
- 2 1000 lbs M65 GP bombs
- 1 350 US gal bomb bay tank
- 16 HVAR rockets
Minelayer, 500 lbs
- 6 500 lbs Mk19 mines
Minelayer, 1000 lbs
- 4 1000 lbs Mk36 mines
Minelayer, 2000 lbs
- 2 2000 lbs Mk25 mines
Minelayer, 500 lbs, long-range
- 3 500 lbs Mk19 mines
- 1 350 US gal bomb bay tank
Minelayer, 1000 lbs, long-range
- 2 1000 lbs Mk36 mines
- 1 350 US gal bomb bay tank
 
P2V-5 (P-2E) Neptune (Minelayer configuration, early)
Sensors:
Search Radar: AN/APS-20C
Targeting Radar: AN/APS-31A
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
Searchlight (70*10^6 candles)
Armament:
Has twin 20mm M24 cannon nose turret, twin 20mm M24 cannon tail turret and twin 12,7mm M2 Browning machinegun deck turret
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 16 HVAR rockets under the wings
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 700 USGal (4200 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
P2V-5 (P-2E) Neptune (ASW configuration, early)
Sensors:
Search Radar: AN/APS-20C
Targeting Radar: AN/APS-31A
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Has twin 20mm M24 cannon nose turret and twin 12,7mm M2 Browning machinegun deck turret OR twin 12,7mm M2 Browning machinegun deck turret OR none
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 16 HVAR rockets under the wings
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 700 USGal (4200 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
 
P2V-5 (P-2E) Neptune (ASW configuration, late)
Sensors:
Radar: AN/APS-20B/E
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Has twin 20mm M24 cannon nose turret and twin 12,7mm M2 Browning machinegun deck turret OR twin 12,7mm M2 Browning machinegun deck turret OR none
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 16 HVAR rockets under the wings
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 400 USGal (2400 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
P2V-5F Neptune
Sensors:
Search Radar: AN/APS-20C
Targeting Radar: AN/APS-31A
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 8 HVAR rockets under the wings
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 700 USGal (4200 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
2 x Westinghouse J34 (used only for take-off and climbing)
 
P2V-6 (P-2F) Neptune (Minelayer configuration)
Sensors:
Radar: AN/APS-33B (360º coverage)
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
Searchlight (70*10^6 candles)
Armament:
Has twin 20mm M24 cannon nose turret, twin 20mm M24 cannon tail turret and twin 12,7mm M2 Browning machinegun deck turret
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 16 HVAR rockets under the wings
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 700 USGal (4200 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
P2V-6 (P-2F) Neptune (ASW configuration)
Sensors:
Radar: AN/APS-33B (360º coverage)
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Can carry 30 AN/SSQ-2B sonobuoys internally
Can carry 16 HVAR rockets under the wings
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 700 USGal (4200 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
 
Suggested loadouts (P2V-5/F and P2V-6):
Maritime Surveillance
- 2 350 US gal bomb bay tanks
ASW
- 8 Mk43/Mk44 OR 4 Mk34 torpedoes
- 8 Mk54 depth charge (underwing, 4 for P2V-5F)
- 30 AN/SSQ-2B sonobuoys
ASW, internal only
- 8 Mk43/Mk44 OR 4 Mk34 torpedoes
- 30 AN/SSQ-2B sonobuoys
ASW, long-range
- 4 Mk43/Mk44 OR 2 Mk34 torpedoes
- 8 Mk54 depth charge (underwing, 4 for P2V-5F)
- 1 350 US gal bomb bay tank
- 30 AN/SSQ-2B sonobuoys
ASW, depth charges
- 16 Mk54 depth charges
- 8 Mk54 depth charges (underwing, 4 for P2V-5F)
- 30 AN/SSQ-2B sonobuoys
ASW, depth charges, internal only
- 16 Mk54 depth charges
- 30 AN/SSQ-2B sonobuoys
ASW, depth charges, long-range
- 8 Mk54 depth charges
- 8 Mk54 depth charges (underwing, 4 for P2V-5F)
- 1 350 US gal bomb bay tank
- 30 AN/SSQ-2B sonobuoys
Surface Attack, 500 lbs
- 16 500 lbs M64 GP bombs
- 16 HVAR rockets (8 for P2V-5F)
Surface Attack, 1000 lbs
- 8 1000 lbs M65 GP bombs
- 16 HVAR rockets (8 for P2V-5F)
Surface Attack, 2000 lbs
- 2 2000 lbs M66 GP bombs
- 16 HVAR rockets (8 for P2V-5F)
 
Surface Attack, 500 lbs, long-range
- 8 500 lbs M64 GP bombs
- 1 350 US gal bomb bay tank
- 16 HVAR rockets (8 for P2V-5F)
Surface Attack, 1000 lbs, long-range
- 4 1000 lbs M65 GP bombs
- 1 350 US gal bomb bay tank
- 16 HVAR rockets (8 for P2V-5F)
Minelayer, 500 lbs
- 16 500 lbs Mk50 mines
Minelayer, 1000 lbs
- 8 1000 lbs Mk52 mines
Minelayer, 2000 lbs
- 4 2000 lbs Mk55 mines
Minelayer, 500 lbs, long-range
- 8 500 lbs Mk50 mines
- 1 350 US gal bomb bay tank
Minelayer, 1000 lbs, long-range
- 4 1000 lbs Mk52 mines
- 1 350 US gal bomb bay tank
Minelayer, 2000 lbs, long-range
- 2 2000 lbs Mk55 mines
- 1 350 US gal bomb bay tank
 
P2V-5FS (SP-2E) Neptune
Sensors:
Radar: AN/APS-20B/E
Radar bombsight: AN/APA-16
ESM: AN/ALR-8 with AN/APA-69A direction finder and AN/APA-74 signal analyser
AN/ALR-3
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Can carry 72 A-size sonobuoys and 8 B-size sonobuoys
Can carry 8 HVAR rockets
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2800 USGal (16800 lb)
Wingtip tanks: 400 USGal (2400 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-30W (3250 BHP)
2 x Westinghouse J34 (used only for take-off and climbing)
P2V-7S (SP-2H) Neptune
Sensors:
Radar: AN/APS-20B/E
Radar bombsight: Aero 7A
ESM: AN/ALR-8 with AN/APA-69A direction finder and AN/APA-74 signal analyser
AN/ALR-3
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Can carry 72 A-size sonobuoys and 8 B-size sonobuoys
Can carry 8 HVAR rockets
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 3010 USGal (18060 lb)
Wingtip tanks: 400 USGal (2400 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-32W (3400 BHP)
2 x Westinghouse J34 (used only for take-off and climbing)
 
P2V-7B Neptune
Sensors:
Radar: AN/APS-20B/E
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Has solid nose with 4 forward-firing 20mm M24 cannons
Can carry 72 A-size sonobuoys and 8 B-size sonobuoys
Can carry 8 HVAR rockets
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2980 USGal (17880 lb)
Wingtip tanks: 400 USGal (2400 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-32W (3400 BHP)
2 x Westinghouse J34 (used only for take-off and climbing)
P2V-7 (P-2H) Neptune
Sensors:
Radar: AN/APS-20B/E
Radar bombsight: AN/APA-16
ESM: AN/APR-9B with AN/APA-69A direction finder and AN/APA-74 signal analyser
MAD: AN/ASQ-8
Searchlight (70*10^6 candles)
Armament:
Has twin 12,7mm M2 Browning deck turret (optional)
Can carry 72 A-size sonobuoys and 8 B-size sonobuoys
Can carry 8 HVAR rockets
Can carry up to 12000 lbs. of ordnance
Fuel:
Permanent: 2980 USGal (17880 lb)
Wingtip tanks: 400 USGal (2400 lb)
Bomb bay tanks: 700 USGal (4200 lb) (up to 2 350 USGal tanks in the bomb bay)
Engines:
2 x Wright R-3350-32W (3400 BHP)
2 x Westinghouse J34 (used only for take-off and climbing)
 
Suggested loadouts (P2V-7 and P2V-7B):
Maritime Surveillance
- 2 350 US gal bomb bay tanks
ASW
- 8 Mk43/Mk44 OR 4 Mk34 torpedoes
- 4 Mk54 depth charge (underwing)
- 72 AN/SSQ-23 and AN/SSQ-28 sonobuoys (unsure how many of each)
- 8 AN/SSQ-15 sonobuoys
ASW, long-range
- 4 Mk43/Mk44 OR 2 Mk34 torpedoes
- 4 Mk54 depth charge (underwing)
- 1 350 US gal bomb bay tank
- 72 AN/SSQ-23 and AN/SSQ-28 sonobuoys (unsure how many of each)
- 8 AN/SSQ-15 sonobuoys
ASW, torpedoes, internal only
- 8 Mk43/Mk44 OR 4 Mk34 torpedoes
- 72 AN/SSQ-23 and AN/SSQ-28 sonobuoys (unsure how many of each)
- 8 AN/SSQ-15 sonobuoys
ASW, depth charges, internal only
- 16 Mk54 depth charges
- 72 AN/SSQ-23 and AN/SSQ-28 sonobuoys (unsure how many of each)
- 8 AN/SSQ-15 sonobuoys
ASW, depth charges, heavy
- 16 Mk54 depth charges
- 4 Mk54 depth charges (underwing)
- 72 AN/SSQ-23 and AN/SSQ-28 sonobuoys (unsure how many of each)
- 8 AN/SSQ-15 sonobuoys
ASW, depth charges, long-range
- 8 Mk54 depth charges
- 4 Mk54 depth charges (underwing)
- 1 350 US gal bomb bay tank
- 72 AN/SSQ-23 and AN/SSQ-28 sonobuoys (unsure how many of each)
- 8 AN/SSQ-15 sonobuoys
Surface Attack, 500 lbs
- 16 500 lbs M64 GP bombs
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 1000 lbs
- 8 1000 lbs M65 GP bombs
- 8 HVAR rockets OR 76 FFAR rockets
 
Surface Attack, 2000 lbs
- 2 2000 lbs M66 GP bombs
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 500 lbs, long-range
- 8 500 lbs M64 GP bombs
- 1 350 US gal bomb bay tank
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 1000 lbs, long-range
- 4 1000 lbs M65 GP bombs
- 1 350 US gal bomb bay tank
- 8 HVAR rockets OR 76 FFAR rockets
Minelayer, 500 lbs
- 16 500 lbs Mk50 mines
Minelayer, 1000 lbs
- 8 1000 lbs Mk52 mines
Minelayer, 2000 lbs
- 4 2000 lbs Mk55 mines
Minelayer, 500 lbs, long-range
- 8 500 lbs Mk50 mines
- 1 350 US gal bomb bay tank
Minelayer, 1000 lbs, long-range
- 4 1000 lbs Mk52 mines
- 1 350 US gal bomb bay tank
Minelayer, 2000 lbs, long-range
- 2 2000 lbs Mk55 mines
- 1 350 US gal bomb bay tank
 
Suggested loadouts (SP-2E and SP-2H):
Maritime Surveillance
- 2 350 US gal bomb bay tanks
ASW
- 8 Mk43/Mk44/Mk46 OR 4 Mk34 torpedoes
- 4 Mk54 depth charge (underwing)
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
ASW, long-range
- 4 Mk43/Mk44/Mk46 OR 2 Mk34 torpedoes
- 4 Mk54 depth charge (underwing)
- 1 350 US gal bomb bay tank
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
ASW, torpedoes, internal only
- 8 Mk43/Mk44/Mk46 OR 4 Mk34 torpedoes
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
ASW, torpedoes, heavy
- 8 Mk43/Mk44/Mk46 OR 4 Mk34 torpedoes
- 4 Mk43/Mk44 torpedoes (underwing)
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
ASW, torpedoes, long-range
- 4 Mk43/Mk44/Mk46 OR 2 Mk34 torpedoes
- 4 Mk43/Mk44 torpedoes (underwing)
- 1 350 US gal bomb bay tank
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
ASW, depth charges, internal only
- 16 Mk54 depth charges
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
ASW, depth charges, heavy
- 16 Mk54 depth charges
- 4 Mk54 depth charges (underwing)
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
 
ASW, depth charges, long-range
- 8 Mk54 depth charges
- 4 Mk54 depth charges (underwing)
- 1 350 US gal bomb bay tank
- 72 AN/SSQ-41 sonobuoys
- 8 AN/SSQ-15 sonobuoys
Surface Attack, 500 lbs
- 16 500 lbs M64 GP bombs
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 1000 lbs
- 8 1000 lbs M65 GP bombs
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 2000 lbs
- 2 2000 lbs M66 GP bombs
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 500 lbs, long-range
- 8 500 lbs M64 GP bombs
- 1 350 US gal bomb bay tank
- 8 HVAR rockets OR 76 FFAR rockets
Surface Attack, 1000 lbs, long-range
- 4 1000 lbs M65 GP bombs
- 1 350 US gal bomb bay tank
- 8 HVAR rockets OR 76 FFAR rockets
Minelayer, 500 lbs
- 16 500 lbs Mk50 mines
Minelayer, 1000 lbs
- 8 1000 lbs Mk52 mines
Minelayer, 2000 lbs
- 4 2000 lbs Mk55 mines
Minelayer, 500 lbs, long-range
- 8 500 lbs Mk50 mines
- 1 350 US gal bomb bay tank
Minelayer, 1000 lbs, long-range
- 4 1000 lbs Mk52 mines
- 1 350 US gal bomb bay tank
Minelayer, 2000 lbs, long-range
- 2 2000 lbs Mk55 mines
- 1 350 US gal bomb bay tank
 
US Navy
#570, #571 - P2V-4
#2015, #2018, #3091 - P2V-5 (maybe convert one of these to SP-2E?)
#583, #586, #588 - P2V-6
#235, #558, #591 - P2V-7 (maybe convert one of these to SP-2H?)
Argentina
#2009? - P2V-5 Neptune (Minelayer configuration, early) (ex-RAF, reused Chilean Neptune DB#)
#2010 - P2V-5 Neptune (ASW configuration, early) with deck turret (ex-RAF)
#3541 - SP-2E without deck turret
#2895 - SP-2H
Australia
#232 - P2V-5 Neptune (Minelayer configuration, early)
#562 - P2V-5 Neptune (ASW configuration, early) with deck turret
#589 - P2V-5 Neptune (ASW configuration, early) without deck turret
#594? - P2V-5F (reused Canadian Neptune DB#)
#2367? - SP-2H (reused Japanese Neptune DB#)
Brazil
#2040, #3041, #3542 - P2V-5 Neptune (ASW configuration, early) without turrets (ex-RAF, two DB# are redundant)
Canada
#592 - P2V-7 (P-2H) Neptune without deck turret
France
#233 - P2V-6 (P-2F) Neptune (Minelayer configuration)
#561 - P2V-6 (P-2F) Neptune (ASW configuration)
#581 - P2V-7 (P-2H) Neptune without deck turret
#2011? - SP-2H (reused French Neptune DB#)
Great Britain
#2017 - P2V-5 Neptune (Minelayer configuration, early)
#2012? - P2V-5 Neptune (ASW configuration, early) with deck turret (reused French Neptune DB#)
Japan
#2368 - P2V-7 (P-2H) Neptune with deck turret
#2369 - SP-2H
Netherlands
#234 - P2V-5 Neptune (ASW configuration, late) with nose and deck turrets
#563 - P2V-7B
#590 - SP-2H
Portugal
#2013 - P2V-5 Neptune (ASW configuration, late) with deck turret (ex-MLD)
#2014 - P2V-5 Neptune (ASW configuration, late) without deck turret (ex-MLD)
 
Sources:
http://www.dtic.mil/dtic/tr/fulltext/u2/a597432.pdf
http://jproc.ca/rrp/rrp3/neptune_ssq2.html
http://www.hartshorn.us/Navy/navy-mines.htm
http://www.navweaps.com/Weapons/WAMUS_Mines.php
http://www.enginehistory.org/Piston/Wri ... rmance.pdf
https://maritime.org/doc/jolie/part2.htm
https://www.history.navy.mil/research/h ... korea.html
https://www.history.navy.mil/research/h ... korea.html
http://www.avialogs.com/index.php/en/ai ... craft.html
http://www.avialogs.com/index.php/en/ai ... craft.html
https://p2vneptune.nl/Manual's/index.html
https://p2vneptune.com/i01.shtml
http://www.verslo.is/baldur/p2/main.htm
http://www.emfa.pt/www/album-021.004.036-p2v-5-neptune
https://altimagem.blogspot.pt/2014/01/9 ... parte.html
https://altimagem.blogspot.pt/2014/01/9 ... parte.html
http://ultimas-curiosidades.blogspot.pt ... no-no.html
http://jproc.ca/rrp/rrp3/neptune.html
https://www.taringa.net/posts/info/8827 ... ptune.html
http://www.histarmar.com.ar/Armada%20Ar ... eptune.htm
http://www.dtic.mil/dtic/tr/fulltext/u2/a129110.pdf
http://avions-de-la-guerre-d-algerie.ov ... 53977.html
http://www.ffaa.net/aircraft/neptune/neptune.htm
http://www.rudnei.cunha.nom.br/FAB/en/p-15.html
http://www.adastron.com/lockheed/neptune/neplist.htm
http://www.karo-aviation.nl/photo/RNLAF ... %20MLD.htm