Bayonet underwater drone (UUV) with tracks can crawl out of the sea. Quite a useful capability…
A few other tracked submarines /UUVs to briefly mentions.
Firstly, in World War Two German engineers built a tracked midget sub. The idea was to launch /recover itself from a slipway rather than drive along the bottom of the seabed
During the Cold War, the #USNavy had the NR-1 spy sub which could drive along the bottom. Wheels not tracks though.
There were several reports of strange tracks on the seabed in Sweden /Norway during the Cold War.
First clear Sentinel 2 satellite images of #Russian Navy submarine bases in Arctic today since oct last year due to arctic winter. #OSINT
Admiral Kuznetsov, aircraft carrier still in dry dock:
2/4 Olenya Guba, the infamous secret base of #Russia's GUGI seabed warfare fleet including Yantar
Is Yantar at sea?
First pass:
3/4
Identifying warships and submarines is difficult in this low resolution imagery, and the 'snow blindness' and cloud doesn't help. But the giant KIROV class battlecruiser Peter the Great stands out easily in Severomorsk
Important: i am not suggesting that we predicted these strikes specifically. If you read the pieces you can see that. But we did observe the increased activity which, in hindsight, was likely at least in part related (simplified)