Ironclads 1860-1918: American Civil War Supplement (2020)

These also include mines, visibility and night fighting and include ship PDF sheets for both the Union and Confederacy.
These rules also cover naval war in rivers, limited visibility, forts and shore defences, mines, spar torpedo boats and interaction with land forces.

A5 size booklet Rules come with turning circles.
PDF ship sheets for Union and Confederate ships, reload counters and speed counters are available from the publisher.

The main Ironclads 1860 - 1918 rules are not needed to play this war-game as all relevant rules are included in this set.

–description from the publisher