MO-4 was the most common of the MO class of small Soviet ships during World War II. Approximately 250 examples were produced. The vessels were incredibly cheap, being unarmoured and with a wooden structure. However, the way the vessels were constructed in 9 distinct sections allowed the vessels to stay afloat despite suffering significant damage.
Though the primary role of MO class vessels was anti-Submarine warfare, they were also utilised to support landing operations and as convoy escorts.
In Cruel Seas, these medium vessels are armed with 2x 40 mm, 2x HMG, Depth Charges, Smoke. Find the full rules in the Close Quarters supplement.