Narrative:

ATIS advised ILS 16R in use at sea. Approach was selected in FMS and briefed. In the base turn at approximately 6000 ft approach asked if we had husky stadium in sight. What we saw was actually the kingdome, but we acknowledged and were cleared for the husky visual to 16L. There is no such approach, the husky visual is to 16R. In the confusion over the correct ground track to follow, other visual traffic cleared to 16R had to be adjusted for our flight path. Fortunately, the other aircraft had us in sight. TCASII in our aircraft advised a TA 'traffic.' no evasive action was required and we ultimately were cleared to land 16R and the other aircraft landed 16L. My suggestions for corrective actions would be to require all approachs in use be included in the ATIS, advise the pilots to 'plan approach to' as early as possible, and not change it in the base turn. I will never again accept a clearance to an approach I haven't briefed. In the same circumstance I will only accept clearance for a visual approach to runway xx. Digging out the (aeronautical) chart and reading it to prepare for approach should not be done on base to final. Also, controllers should not modify a published approach.

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Original NASA ASRS Text

Title: FLC OF ACR LGT ACFT HAVE DIFFICULTY MAKING AND FOLLOWING A PUBLISHED VISUAL APCH RESULTING IN ATC ASSIGNING PARALLEL RWY TO THAT ORIGINALLY GIVEN.

Narrative: ATIS ADVISED ILS 16R IN USE AT SEA. APCH WAS SELECTED IN FMS AND BRIEFED. IN THE BASE TURN AT APPROX 6000 FT APCH ASKED IF WE HAD HUSKY STADIUM IN SIGHT. WHAT WE SAW WAS ACTUALLY THE KINGDOME, BUT WE ACKNOWLEDGED AND WERE CLRED FOR THE HUSKY VISUAL TO 16L. THERE IS NO SUCH APCH, THE HUSKY VISUAL IS TO 16R. IN THE CONFUSION OVER THE CORRECT GND TRACK TO FOLLOW, OTHER VISUAL TFC CLRED TO 16R HAD TO BE ADJUSTED FOR OUR FLT PATH. FORTUNATELY, THE OTHER ACFT HAD US IN SIGHT. TCASII IN OUR ACFT ADVISED A TA 'TFC.' NO EVASIVE ACTION WAS REQUIRED AND WE ULTIMATELY WERE CLRED TO LAND 16R AND THE OTHER ACFT LANDED 16L. MY SUGGESTIONS FOR CORRECTIVE ACTIONS WOULD BE TO REQUIRE ALL APCHS IN USE BE INCLUDED IN THE ATIS, ADVISE THE PLTS TO 'PLAN APCH TO' AS EARLY AS POSSIBLE, AND NOT CHANGE IT IN THE BASE TURN. I WILL NEVER AGAIN ACCEPT A CLRNC TO AN APCH I HAVEN'T BRIEFED. IN THE SAME CIRCUMSTANCE I WILL ONLY ACCEPT CLRNC FOR A VISUAL APCH TO RWY XX. DIGGING OUT THE (AERO) CHART AND READING IT TO PREPARE FOR APCH SHOULD NOT BE DONE ON BASE TO FINAL. ALSO, CTLRS SHOULD NOT MODIFY A PUBLISHED APCH.

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.