Might have been safe to let him see; he might not have spotted doubletalk and would not have spotted error in location. Few people look at stars when p-suited even when Sun doesn’t make it futile; still fewer can read stars—and nobody can locate himself on surface without help unless he has instruments, knows how to use them and has tables and something to give a time tick. Put at crudest level, minimum would be octant, tables, and good watch. Our visitors were even encouraged to go out on surface but if one had carried an octant or modern equivalent, might have had accident.