The annual Random Stratified Trawl Survey was undertaken in Division 58.5.2 in the vicinity of Heard Island during April 2013. This paper provides a preliminary assessment of mackerel icefish population structure, abundance and yield for the area of Division 58.5.2 to the west of 79° 20’ E using standard CCAMLR methods. A large cohort of fish, estimated to be 3+, dominates the population in both abundance and biomass. Two scenarios for harvest are presented – a typical two year projection of the population, and a projection accounting for the fact that the abundant 3+ year class is likely to be unavailable beyond 2013/14. Under the first scenario, a catch limit of 764 t is recommended for 2013/14 and 571t for 2014/15, while under the second scenario, a catch limit of 1267 t is recommended for 2013/14 and 0 t for 2014/15.