show_temperature(f, dive->watertemp, " <watertemp>", "</watertemp>\n");
show_duration(f, dive->duration, " <duration>", "</duration>\n");
show_duration(f, dive->surfacetime, " <surfacetime>", "</surfacetime>\n");
show_temperature(f, dive->watertemp, " <watertemp>", "</watertemp>\n");
show_duration(f, dive->duration, " <duration>", "</duration>\n");
show_duration(f, dive->surfacetime, " <surfacetime>", "</surfacetime>\n");