Narrative:

While on a tour of the juneau ice field, my passenger touches my right arm very casually and points to the 9 O'clock position. As I look over the cessna passed just under the airplane from left to right. I just had a glimpse of the cessna and never saw it again. I was with other company airplanes on the 'same' tour which I think the other pilot was looking for/at. In this type of flying I don't look for traffic in the 9 O'clock position. I do now! Our tour route is published. I think private operators need to avoid congested tour areas. He could've taken a different route. I should look for traffic farther to the sides and flanks. I do not think airspace restrs (ie, 50-2) would help. More pilot vigilance is needed from both parties.

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Original NASA ASRS Text

Title: A DHC2 FLYING A SIGHTSEEING TOUR OVER AN ICE FIELD HAS A VERY CLOSE NMAC WITH A CESSNA. TFC WAS SEEN AND POINTED OUT BY A PAX IN THE R SEAT. RPTR ADMITTED THAT HE NEVER LOOKED FOR TFC IN HIS 9 O'CLOCK POS. RPTR INTIMATES THAT OTHER ACFT SHOULD AVOID TOUR RTES.

Narrative: WHILE ON A TOUR OF THE JUNEAU ICE FIELD, MY PAX TOUCHES MY R ARM VERY CASUALLY AND POINTS TO THE 9 O'CLOCK POS. AS I LOOK OVER THE CESSNA PASSED JUST UNDER THE AIRPLANE FROM L TO R. I JUST HAD A GLIMPSE OF THE CESSNA AND NEVER SAW IT AGAIN. I WAS WITH OTHER COMPANY AIRPLANES ON THE 'SAME' TOUR WHICH I THINK THE OTHER PLT WAS LOOKING FOR/AT. IN THIS TYPE OF FLYING I DON'T LOOK FOR TFC IN THE 9 O'CLOCK POS. I DO NOW! OUR TOUR RTE IS PUBLISHED. I THINK PVT OPERATORS NEED TO AVOID CONGESTED TOUR AREAS. HE COULD'VE TAKEN A DIFFERENT RTE. I SHOULD LOOK FOR TFC FARTHER TO THE SIDES AND FLANKS. I DO NOT THINK AIRSPACE RESTRS (IE, 50-2) WOULD HELP. MORE PLT VIGILANCE IS NEEDED FROM BOTH PARTIES.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.