[4] The hull was primarily constructed of pine with the keel and longerons being ash, with a 3mm plywood skinning covering 25 frames, of which 4 were watertight bulkheads.

[3] The undercarriage retracted by rotating forwards and up in an arc until the axle was level with the cockpit coaming, pulled into position with cables and springs.

[3] It could also be fitted with skis for winter operations from ice and snow, while some examples had the undercarriage removed, or weren't built with them.

[2] The Sh-2 remained in service until 1964[2] and set a number of unofficial flying boat and seaplanes records.

[citation needed] The Sh-2 replaced the obsolete MU-1 floatplane, whose design dated from before World War One, with the Soviet Air Forces.