C180 TAKES EVASIVE ACTION WHEN OVERTAKING A C170 ON APCH TO LAKE HOOD.

Narrative

I WAS FLYING INBOUND TO LAKE HOOD STRIP ON A VERY BUSY AFTERNOON. I HEARD AN ACFT RPT POTTER'S MARSH. I WAS BEHIND HIM AND FOLLOWED HIM TO THE MANDATORY RPTING POINT (TUDOR ROAD OVERPASS). I WAS BEYOND POTTER'S MARSH AND I HEARD ANOTHER ACFT RPT HIS LOCATION. HE WAS BEHIND ME; AND I THOUGHT TO RPT MY LOCATION AT THE TIME TO LET HIM KNOW WHERE I WAS; BUT THE FREQ WAS SO CONGESTED I DIDN'T HAVE THE OPPORTUNITY. I RPTED MY POS AS BEING JUST S OF THE OVERPASS WHEN I GOT THERE. ATC WAS GIVING ADVISORIES ABOUT AN EBOUND CUB; WHICH I RPTED I HAD IN SIGHT. ATC ADVISED ME I WAS #2 TO LAND AND I BEGAN MY DSCNT. SHORTLY AFTER MY CALL; I HEARD ANOTHER ACFT CALL THE TUDOR ROAD OVERPASS RPTING POINT; AT THIS TIME THERE WAS SOME CONFUSION WITH TFC FROM THE N; HE HAD A SIMILAR N-NUMBER TO MINE; BUT I DIDN'T PAY MUCH ATTN TO THEIR NUMBERS; ONLY THE LOCATION AND THE CONGESTION OF THE FREQ. WHILE I WAS LNDG I NOTICED 4 FLOAT PLANES ON THE LAKE LINING UP FOR TKOF; AND TWO AT THE STRIP; WAITING TO GO. I HAD AN UNEVENTFUL LNDG. I HEARD THE PLANE THAT HAD BEEN JUST BEHIND ME LAND SHORTLY AFTER ME. AFTER I HAD FINISHED SECURING MY AIRPLANE AT THE TIE-DOWN; A MAN DROVE UP TO ME AND ASKED ME IF I HAD SEEN HIS PLANE IN THE AIR. I SAID NO. HE HAD BEEN #3 TO LAND AT THE STRIP JUST BEHIND ME; AND HE INFORMED ME THAT WE HAD FLOWN CLOSE ENOUGH FOR HIM TO SEE MY RIVETS. I HAD NEVER SEEN HIM; BUT WHEN HE SAW ME; HE TOOK IMMEDIATE EVASIVE ACTION. AFTER TALKING; WE REALIZED THAT HE HAD BEEN LOWER THAN ME; AND OVERTAKING ME BY ABOUT 20 KTS. AS I WAS DSNDING; I COULDN'T SEE UNDER OR BEHIND ME. THIS SIT COULD HAVE BEEN AVOIDED POSSIBLY BY SEVERAL ACTIONS; INCLUDING; IF I HAD CALLED THE EARLIER RPTING POINT; IF THE FREQ WOULDN'T HAVE BEEN SO CONGESTED; MANDATORY DSCNT PROCS ESTABLISHED; (WHICH WILL STILL CONFLICT WITH DEPARTING TFC) AND IF I HAD BEEN IN CONTACT WITH APCH CTL. NORMALLY I AM USING APCH; BUT THIS AIRPLANE HAS NO XPONDER. I HAVE AN APPOINTMENT TO HAVE A XPONDER WITH MODE C ENCODER INSTALLED THIS WK. I AM ALSO GOING TO COMMENT TO THE ANC AIRSPACE MGR ABOUT THESE PROBS AND OFFER SOME SUGGESTIONS TO IMPROVE THE SAFETY OF THE NEW SEWARD SEGMENT. POSSIBLE IMPROVEMENTS: 1) USE SEPARATE FREQS FOR N AND S TFC; WILL RESULT IN LESS CONGESTION. 2) USE DIFFERENT RPTING POINTS FOR S DEPS AND ARRS -- IT SEEMS TO WORK FOR THE N (BOAT HUB TO BALL FIELD FOR ARRS). 3) PLT EDUCATION -- ALL PLTS SHOULD BE AWARE OF THE REQUIRED ALTS AND RECOMMENDED ROUTES. I KNOW THEY ARE NOT; EFFORTS SHOULD BE MADE TO MAKE CHANGES KNOWN TO PLTS.