Dykhuset AB, Dykhuset i Stockholm
Kungsgatan 73, 112 27 Stockholm, Sweden
Plus is a three-masted iron barque that sank off Mariehamn near Kobba Klinta. Plus ran aground in mid-December 1933 on its way home to Mariehamn.
Once ranked top 10 wreck in the baltic sea by the scandinavian dive magazine DYK and it is well deserved.