CAT Helicopter Scenario
James H. Vogt, under Contract No.: DAA21-87-C-0141
1988-05-16
<a rel="nofollow" class="external text" href="https://www.dtic.mil/dtic/tr/fulltext/u2/a196940.pdf">Collision Course Guidance for Discretely Maneuverable Projectiles</a>, Page 2, Figure 1