Encl (1) to COMDTINST 16151.1C
2. b.
(2)
(cont'd)
(a)
Direct Assistance (DA): Domestic icebreaking operations conducted to
assist a specific benefiting vessel(s). Assistance upon request and
convoying are common examples of DA.
(b)
Preventive Icebreaking (PI): Domestic icebreaking operations conducted
to assist commercial vessel movements for which specific vessel(s) can
not be readily identified. Channel maintenance and harbor breakout
operations are common examples of PI.
(c)
Flood Control/Prevention Workload (FC): Domestic icebreaking