In a previous article, said:
What's the farthest west civilian airport in the Aleutians? I see
military airports on Shemya and Attu: what happens if a civilian
aircraft comes along and politely asks to join the traffic pattern?

PATU, Casco Cove CGS, is listed as joint use. It's at 173 degrees EAST.

mysql select * from waypoint where type = 'AIRPORT' and state = 'AK' and longitude -150 order by longitude;
+------+----------------+---------+----------------+---------+-------+---------+------------------+-------------------+-------------+------------+-----------+----------------+----------+-----------+------+
| id | datasource_key | type | name | address | state | country | latitude | longitude | declination | datasource | elevation | main_frequency | ispublic | chart_map | tpa |
+------+----------------+---------+----------------+---------+-------+---------+------------------+-------------------+-------------+------------+-----------+----------------+----------+-----------+------+
| PASY | US85050 | AIRPORT | EARECKSON AS | | AK | US | 52.712275 | -174.11362 | -1.65 | 2 | 98 | | 1 | 0 | NULL |
| SYA | 50699.*A | AIRPORT | EARECKSON AS | SHEMYA | AK | US | 52.712275 | -174.113619444444 | -3 | 1 | 97 | 127.200 | 0 | 0 | NULL |
| PATU | US00356 | AIRPORT | CASCO COVE CGS | | AK | US | 52.828356 | -173.180306 | -1.14 | 2 | 40 | | 1 | 0 | NULL |
| ATU | 50046.*A | AIRPORT | CASCO COVE CGS | ATTU | AK | US | 52.8283555555556 | -173.180305555556 | -3 | 1 | 40 | 122.900 | 0 | 0 | NULL |
+------+----------------+---------+----------------+---------+-------+---------+------------------+-------------------+-------------+------------+-----------+----------------+----------+-----------+------+
4 rows in set (0.26 sec)



--
Paul Tomblin http://xcski.com/blogs/pt/
"An NT server can be run by an idiot, and usually is." -- Tom Holub, a.h.b-o-i