I. To stay in topic I can mention Soviet gunboat "Sheksna" of Ladoga military flotilla, which was ex-Finnish armored icebreaker "Aallokas" [370 tons; 34.15x7.5x3.35 m; 520 hp steam engine; 11 knots; 1000 miles at 8 knots; 56 men crew]. It was built in 1936 in Sortavala [Sortavalan Telakka ja Konepaja Oy shipyard] and the ship was taken in spring 1940 by Red Army units and Soviet warships of Ladoga [after sign Moscow Peace Treaty, which finished the Winter war].
As I want to discuss only Finnish army as much as possible here, please, provide me with the info about service of "Aallokas" in Finland [before the Winter war].
I know that when the Winter war began the icebreaker was armed with two 75mm guns and two 40mm anti-aircraft guns. It was the largest vessel of the Finnish Ladoga Flotilla and the flagship of the gunboats flotilla of lieutenant-commander Asikainen [4 gunboats: "Aallokas", "Aunus", "Tarmo" and "Vulcan"]. From 14.12.1939 till 12.01.1940 "Aallokas", "Tarmo" and "Vulcan" performed 11 raids to the areas near Pitkäranta, Mursula and Koirinoja. It total during this raids the gunboats fired at the enemy ~150 75mm shells.
The photo of icebreaker "Aallokas" at Sortavala harbour, winter 1936 is from
II. Soviets also took Finnish icebreaking tug "Aunus" mentioned above [served as mine-sweeper TShch-100 during WWII] at Ladoga Lake in March 1940. Specifications of "Aunus" - 112 tons; 26x5.3x2.1 m; 2 steam engines 280 hp total; 10.5 knots; 750 miles at 7 knots; 48 men.
"Aunus" was built in Turku shipyard Wm. Crichton & Co Ab in 1900.
In 1919 the tug was reequipped into gunboat and became a part of Finnish Ladoga flotilla. According to the 1920 Tartu Peace Treaty between Soviet Russia and Finland "Aunus" should have armament of 2x47mm guns + 1 MGs + 30 mines.
"Aunus" [commander - lieutenant T. Helikari] participated in artillery attacks and setting minebanks during the Winter war, for example 07.12.1939 "Aunus" set 16 mines near Vuaratsu Island.
Since 1982 TShch-100 [ex-"Aunus"] is at eternal stay in Novaya Ladoga in Russia -
The photo of icebreaking tug (gunboat) "Aunus" in 1928 is from
Best regards, BP