Drawing of a <a href="https://en.wikipedia.org/wiki/Bell_214ST" class="extiw" title="w:Bell 214ST">Bell 214ST</a> helicopter.
U.S. Government
Extracted from PDF version of the NIFC <a rel="nofollow" class="external text" href="https://gacc.nifc.gov/nrcc/dispatch/aviation/aviation.htm">R1/R4 Aviation Management Plan</a> (direct PDF URL <a rel="nofollow" class="external autonumber" href="https://gacc.nifc.gov/nrcc/dispatch/aviation/R1R4_AviationPlan.pdf">[1]</a>)