Where Cossack's Altmark boarding party jumped

Can Haida show how HMS Cossack boarded Altmark?

Yes. The comparable location is the rail area beside B turret, from which ropes and the first boarding party would have crossed.

Haida's side near B turret provides the comparable jumping-off point aboard HMS Cossack. Ropes were thrown across before the first boarding team crossed from the rail area. The location lay where the railings run beside B turret. Seeing that geometry on a surviving Tribal-class hull makes the celebrated 1940 boarding action easier to reconstruct.