Stage 1. The posted coordinates will take you to W 91 (MS0139), a 1953 USC&GS benchmark.
Stage 2. To find the final cache location, from Stage 1, project a new waypoint with a bearing of 180.3° at a distance of 2053.7 feet.
After you log an online find for this cache, don't forget to separately log an online find for the benchmark in the benchmark section of Geocaching.com