Joint Metoc Handboo - IHMC Ontology and Policy Management

C-METOC Impacts
*WATERBORNE ASSAULT (GENERAL)
CCRC SS1 SS2 > SS2
LCM8 SS2 SS3 > SS3
LCU SS2 SS3 > SS3
LCAC SS3 SS4 > SS4
(Surf and/or combined seas have greater impact on exiting well deck rather than onshore
arrival)
*Landing Craft parameters based on normal troop loadout for AMW assault.
Max Surf
CCRC < 2 FT 2-3 FT > 3 FT
LCM8 < 6 FT 6-7 FT > 7 FT
LCU < 6 FT 6-7 FT > 7 FT
LCAC < 7 FT 7-8 FT > 9 FT
Winds
LCAC < 25 KTS > 25-30 KTS > 30 KTS
Breaker Type
LCAC Spilling Surging Plunging (steep)
Littoral Current < 1 KT 1-2 KTS > 2 KTS
(LCU)
(This is very generalized and can change significantly depending on user/mission type.)
Modified Surf Index
(MSI)
LCM8 < 7 7-8 > 8
LCU < 11 11-12 > 12
LCVP < 4 4-5 > 5
*SIG Breaker HGT 0-4 FT 4-8 FT 8-12 FT
LCAC 75 tons overload 60 tons (normal) 45 tons (reduced)
*MSI criteria does not impact LCAC operations, limiting conditions for LCAC operations
are based on load size and significant breaker heights.
AMPHIB
MARINE
WARFARE /
HELO
CLG > 5000FT
VIS > 4800M
CLG 300-4999FT
VIS 1000-4799M
CLG < 300FT
VIS < 1000M
C-14