2006 January-September: Japan, Taiwan, and South Korea (Japanese Soc. Promotion of Science; Taiwan Academy of Sciences; Agricult. Biol. Dept. of Chonnam Natl. University)
2004 October-November: Lecturer and field guide for Hapag Lloyd's MS ‘Bremen' (Micronesia and Papua New Guinea)
2003 January: Lecturer & field guide for Hapag Lloyd's MS ‘Bremen' (Antarctic Peninsula & Subantarctic Islands)
2002 March: Visiting Professor at Mie University, Japan (by invitation through the Japanese Academy)
1999/2000 December-January: Millennium Lecturer & field guide for Hapag Lloyd's MS ‘Bremen' (Antarctic Peninsula & Subantarctic Islands)
1997 September: Invited participant of Int. Bioluminescence Expedition to New Zealand, (University of Electro-Communications , Prof. H.Niwa, Tokyo)
1993 January-February: Leader of 1st Jamaican Antarctic Expedition to Jelcho Base (Antarctic Peninsula), sponsored by University of the West Indies and the Chilean Antarctic Programme
1990 November-December: Leader of research team to Scott Base and Dry Valleys (Antarctica), sponsored by Waikato University Antarctic Research Programme (New Zealand)
1991 June-July: Lectures & research at N-E-H-University; Sophisticated Instrumentation Centre; Shillong, Meghalaya, India
1988 November-December: Leader of 5-person team to Scott Base (Antarctica), sponsored by Waikato University Antarctic Research Programme and grant from Japanese Ministry of Culture, Science, and the Arts
1987 August lecture tour (Japan & Korea): Tokyo Agriculture University; Yokohama City University, Kitasato University, Tohoku University, Hamamatsu Medical University, and Kyungpook National University
1985 August: Team leader of Expedition to Nouvelle Caledonie, sponsored by National Geographic Society of the U.S.A
1984 November-December: Antarctica (Scott Base and Dry Valleys), project leader, sponsored by Waikato University Antarctic Research Programme through New Zealand University Grant
1983 July: MS "Astor" trip to Jan Mayen Island and Spitzbergen (Ny Ålesund), sponsored by Society of Pulmonologists and Allergologists in Germany
1979 September lecture tour about Antarctic Research (Peoples' Republic of China): Beijing, Shanghai, Tsingtao, and Canton, by invitation of and financed by the Chinese Academy of Sciences
1979 April lecture tour (U.S.A.): University of Wisconsin (Madison), Yale University (New Haven), State University of New York (Stony Brook)
1978-1979 November-January: Antarctica (Scott Base and Ross Ice Shelf, Station J9). Team leader of Waikato University Antarctic Research Project, supported by University Grants Committee and participant of National Science Foundation funded 'Ross Ice Shelf Project' (U.S.A.)
1977-1978 November-January: Antarctica, a survey of various habitats (marine, limnic, dry valleys, volcanic, ice-caves, South Pole, etc.), sponsored by Waikato University Antarctic Research Programme through New Zealand University Grant
1975 March-May: RV "Alpha Helix" South East Asia Bioluminescence Expedition to the Banda Islands (Indonesia), sponsored by Scripp's Institution of Oceanography, La Jolla (U.S.A.)
1974 Sept.-October: Trobriand Islands, Melanesia (West Pacific), sponsored by 'Leonaris Medical Film Library', Böblingen (Germany)
1973 June-July: Visit to University of Papua at Port Moresby and Central Australian Aboriginal reservations, sponsored by Australian National University, Canberra (Australia)
1972 May-July: Expedition to Papua New Guinea, sponsored by Australian National University, Canberra (Australia)
1967 April-August: FRV "Walther Herwig" South Atlantic Ocean Research Trip; joint support and operation by South African and German government organizations
1964 & 65 Summer semester breaks spent in the West Indies and (1966) in Japan
