: abstract / A.G. Linsley -- The history of the midget submarines / R.L. Vallentine -- Expedition to Kaafjord, Norway, to locate missing R.N. Midget Submarine H.M.S. X-5 / P. Cornish -- Shipwreck-robbery in the light of a Roman shipwreck near Ibiza / F.J. Meijer -- Underwater documentation with the aid of geodetic and photogrammetric methods / E. Lundin -- Four methodical groups of underwater archaeological sites / Ch. Keller -- Open sea marine archaeological excavation with daily rigging of the excavation equipment / O.T. Engvig -- Blocksheaves and bushing : a way to date 19th century wrecks : abstract / Chr. H. Ericsson -- Conservation of cast-iron objects recovered from the sea / Ora Patoharju -- Three seasons of excavation on the V.O.C. ship Batavia ... / Catherine Ingelman-Sundberg -- Eight years of diver excavation in Switzerland / U. Ruoff.