https://nsidc.org/arcticseaicenews/
The extent of sea ice in the Arctic is minimum during September. It melts out rapidly during August and expands rapidly in October.
Chinese, Russian Vessels in Vicinity of Baltic Sea Links Damage
A Chinese container vessel and a Russian-flagged ship investigated over damage to a gas pipeline in the Gulf of Finland were also present at the sites, and at around the time two telecoms cables sustained damage, vessel tracking data showed.
Only two ships were present at all three sites around the approximate time when the damage occurred, according to data from MarineTraffic, a ship-tracking and maritime analytics provider.
The ships are: the NewNew Polar Bear, a Chinese container ship traveling between China and Europe via the Northern Sea Route in the Arctic, and the Sevmorput, a nuclear-powered cargo vessel transiting between Murmansk and St. Petersburg.