Upper Ottawa River area, LASs of rangers climbing lookout tower ladder. Interior shots in tower of lookout men using direction compass with finder map and sighting pointer, to locate fire. LSs of smoke from fire located by sighting pointer. Several shots of lookout men in tower using radio telephone to contact dispatcher's office at rangers' headquarter. Numerous shots in dispatcher's office at headquarter, rangers in touch with men in lookout tower by radio telephone, consulting maps on wall to pinpoint location of fire.