After looking at the pictures, it appears that the most forward tube on each side is staggered, not side by side. This would also help understand the door to door spacing on each side not being closer. Here is what my crude top down estimate is for the configuration.

New photos means updated sketches... and an attempt to figure out those masts @saturnax1.bsky.social Presumed port side shows hatches/hinges; so 10 tubes in total?

Well, time to get crackin' on some new stuff. Napkin sketch of N.Korean SSB(N?) shown 24/25 Dec. @saturnax1.bsky.social @covertshores.bsky.social

New N.Korean SSB(N?) just dropped @saturnax1.bsky.social @covertshores.bsky.social www.reddit.com/r/submarines...

BAE Systems has been awarded a $36 million production contract from Lockheed Martin to deliver Multifunction Modular Mast (MMM) systems for integration onto U.S. Navy submarines 🇺🇸 www.navalnews.com/naval-news/2...

Just an incredible photo. USS Skate. Life Magazine, 1958

Hot damn... @navalnews.com

Penetrating vs non-penetrating periscopes and optronics; to make it simple

#SubThursday #Submarines "Survey of the K-278 Komsomolets nuclear submarine lying on the bottom of the Norwegian Sea" by Prokhor Vechkanov

Saw some photos of S62 Sindhuvijay with an interesting feature on the exhaust ports. I would guess some kind of exhaust diffuser, so I've updated my illustrations

New (to me) images of a PLAN 09IIIB SSGN underway. Via "by78"/SDF.

Updated the illustration for INS Drakon sail.

Future Israeli Navy Dolphin-class Batch-II submarine INS Drakon leaving Kiel, Germany - September 1, 2025 SRC: TW-@ScharnHelwin

INS Sindhuvijay (S62) in Chennai spotted with what looks to be exhaust diffusers fitted aft on the sail covering the exhaust ports. Reminiscent of the ones seen on Type 209s. Neat!

More scopes!

The pixels! I want to see the top of that sail!

What appears to be either the first or the second Hangor-class SSK built by Wuchang for Pakistan, undergoing trials. First hull was launched back in 2024, the second in March this year. Note straight sail, somewhat like 039A config, but with 039B weather bridge. Via "by78"/SDF.

More Hai Kun masts! Probable periscope and ESM masts. New photos and source: udn.com/news/story/1...

New image of INS Drakon in Kiel. Drakon is the third boat of the Dolphin 2-class, significantly modified to launch missiles via VLS in the sail. Source: www.kn-online.de/lokales/kiel...

Some more good shots of the indigenous Taiwanese submarine. There's no question that the hull is, literally, somewhat rough around the edges. It remains to be seen if intended follow-ups are more refined. Source: udn.com/news/story/1...

#SubSunday #Submarines Vietnam People's Navy first indigenous TN 75-class midget submarine VPNS "43" with her support ship VPNS "832", photos released mid May, 2025. TN 75 ("Tàu Ngầm", Submarine) design is based on the North Korean Yugo-class midget submarines purchased by Vietnam in 1997.

Swedish Navy Södermanland-class diesel-electric attack submarine HSwMS Södermanland leaving Eckernförde, Germany - June 5, 2025 SRC: TW-@ScharnHelwin

#SubFriday #Submarines TLAM Strike Operations: "Standby tube 1" "Shoot tube 1" "Missile away tube 1" "Booster ignition" "Booster separation tube 1, transition to cruise" @covertshores.bsky.social @rstirn.bsky.social @alxluck.bsky.social @mikeplunkett.bsky.social

Some Russian sticks. Some comms masts and variations found on Russian submarines

[VIDEO] Safran Electronics and Defense is now applying its proprietary AI algorithm to help with the image processing and with the detection, identification and classification of contacts captured from the submarines optronic masts. www.navalnews.com/naval-news/2...

#SubSaturday #Submarines USS Louisiana (SSBN-743), the 18th and last boat of the Ohio-class of nuclear-powered ballistic missile submarines in a drydock. @covertshores.bsky.social @rstirn.bsky.social

Excellent photo of the mast lineup of the first Reis-class (Type-214TN) submarine, TCG Pirireis. The photo was taken during a naval parade conducted by the Turkish Submarine Fleet to commemorate martyrs lost their lives at TCG Dumlupınar, which sunk in Çanakkale Strait on 4 April 1953.

New mast seen on RN Astute-class SSN *

At UDT 2025 exhibition in Oslo, Norway, Turkiye’s leading defense company ASELSAN showcased the MERCAN family of submarine optronic mast systems 🇹🇷 www.navalnews.com/event-news/u...

Even MORE communications masts, mostly from Type 209s #Submarines

Some communications masts #Submarines

Just realized I hadn't posted these on Bluesky yet. All the periscopes of the World's Navies #Submarines

Note the mast installation in progress FYI @rstirn.bsky.social @covertshores.bsky.social @alxluck.bsky.social @mikeplunkett.bsky.social

Why not follow up with some US Navy periscopes and optronics? And the classes they are found on. #Submarines

Some Russian/Soviet scopes and the #Submarine classes they are found on

Boeing's XLUUV iterations: Echo Voyager, Orca v1, Orca v2

Taiwan's Hai Kun has masts! Source: www.facebook.com/photo/?fbid=... Curiously, the hoisting body on the right seems to be backwards(?) @saturnax1.bsky.social

Future Northern Fleet Project 08851 Yasen-M/SEVERODVINSK II-class SSGN Arkhangelsk (K-564) finished her sea trials and is preparing for commissioning. Photos from early December 2024 by Oleg Kuleshov.

#SubSaturday #Submarines #USNavy #Naval #History 1. In 1976, a special purpose nuclear-powered submersible NR-1 was tasked to recover AIM-54A Phoenix missile from an F‐14 fighter plane that fell from the deck of the carrier USS John F. Kennedy (CV-67) during a NATO exercise Sept. 14. 1976.

Dive-XLs are at-sea nearly every single day in Australia and the United States, and the vehicle recently concluded a 100 hour single voyage — the longest underway for a vehicle of this class 🇺🇸 www.navalnews.com/naval-news/2...

Sails, masts and antennas of the Russian Yasen and Yasen-M class submarines

Sail, masts and antennas of Japan's Taigei class submarine

German company Gabler introduced an expendable communication buoy and an underwater acoustic monitoring module during the Euronaval 2024 🇩🇪 www.navalnews.com/event-news/e...

🔺Israel submarine - Update Israeli Navy commissions INS Drakon at ceremony in Kiel, 12 November 2024. H/t for the report to @kieldolphin.bsky.social www.kn-online.de/wirtschaft/r...

Sails and masts of Chile's O'Higgins and Carrera boats

Boeing's Echo Voyager, Orca, and Orca with Payload Module

My illustration of Anduril's Ghost Shark XL-AUV! What do you suppose is in that tiny sail? Where do you think the payload modules go?

The Ulas are going to get some optronic masts! www.hensoldt.net/news/hensold...

My illustrations of the German Type 212A batch I & II submarines

Updated Virginia Class Block 4 illustration to note the squared mast hatch covers and blocky limber holes at the base #Submarines