[1] The Russian coastal fleet consisted of a frigate, eight xebecs, five brigs, three bomb vessels, eighteen galleys, twenty-nine half-galleys, twelve gun sloops and three cutters with a total of 12000 men plus those aboard auxiliaries.

Advantage shifted from the defenders to the attackers at 16:00 when the right wing of the Russian coastal fleet led by Giolio Litta penetrated the unblockaded narrow passage between Majasaari (Koiromsari) and Tiutine.

[4] Russians captured the turuma Sällan Värre which had run aground while defending the blockades and Enrique MacDonell's hemmema Oden which had come to its aid.

The turuma Björn Järnsida, which had been Ehrensvärd's flagship at the start of the battle, ran aground and struck its colors after bravely fighting nearly to the last man.

Navigation of the shallow yet unobstructed narrow between Tiutine and Koiromsari by Giulio Litta's small galley force was the crucial factor in Russian success at Svensksund.

A successful Russian blockade at Porkkala prevented two archipelago frigates, roughly twenty galleys, and several gun sloops and yawls from reaching Svensksund in August 1789.

Ehrensvärd's decision not to blockade the narrow between Tiutine and Koiromsari due to his belief that it was too shallow to navigate was a crucial error; and delayed construction of obstacles in the straits opening towards Frederikshamn made it possible for the Russians to clear them quickly.