Aft Portable Trough Cover
The aft portable cover or Flush Deck Nose Gear
Launch (FDNGL) cover, covers the launch valve area
and houses the bridle tensioner cylinder and NGL unit.
Access covers are provided for the bridle tensioner
Shroud and Periphery Drain
On most ships, a shroud and periphery drain
assembly is installed directly below the FDNGL cover
and on top of the launch valve to further protect the
launch valve and its associated piping from corrosion
TROUGH, FORWARD OF STATION 0 (TYPICAL)
FLUSH DECK NOSE GEAR
TROUGH, AFT OF STATION 0 (TYPICAL)
Figure 4-31.Catapult trough installation.