FORWARD STRUCTURE/DECK
EXTENDED LINE-UP LIGHTS
SURFACE FLOODLIGHTS
Extended line-up lights are white lights installed at
White floodlights, with red filters, are provided to
the forward end of the deck-installed line-up lights and
illuminate any structure forward of the landing area and
extend above the flight-deck level. These lights merely
to provide greater depth perception to the pilot during
extend the line-up lights forward to provide the
night operations. At least two fixtures, one port and one
helicopter pilot with a better visual picture of line up
starboard, must be installed and adjusted to illuminate
the aft face of the hangar as well as structures forward
with information during night landing operations.
of the landing area. Other fixtures are installed and
The extended line-up lights are a minimum of six
adjusted to illuminate the landing area itself. These
individual light fixtures either mounted vertically to a
fixtures are connected to a motor-driven variable
bulkhead or on a light bar assembly mounted to the flight
transformer (intensity). Each fixture is conncted to the
deck. Each extended line-up light fixture is connected
low voltage side of a separate 120/30-volt step-down
to a 6.5-volt secondary of a 120/6.5-volt step-down
transformer.
transformer. The primaries of the transformers are
connected to the same circuit as the deck-installed,
MAINTENANCE FLOODLIGHTS
line-up lights.
Red maintenance floodlights are required for night
preflight and postflight maintenance. The floodlight
FLASH SEQUENCER
assembly consists of a light fixture, lamp, red filter,
on/off switch, and support. The light is wired to the
The flash sequencer (fig. 12-20) is wired into the
ship's 120-volt, 60Hz, single-phase power supply.
line-up lights to provide the helicopter pilot with
additional visual cues and depth perception during night
OVERHEAD FLOODLIGHTS
The cam-operated unit
landing approaches.
sequentially flashes 9 to 10 line-up lights. On ships with
White overhead floodlights with yellow and red
both port and starboard approaches, the flash sequencer
filters provide illumination of the helicopter deck for
must be capable of producing flashes (strobing) of either
support of night operations. These lights are mounted
port or starboard line-up lights as selected by controls
above the landing area and are connected to a
motor-driven variable transformer.
on the lighting control panel.
WAVE-OFF LIGHT SYSTEM
VERTICAL DROP-LINE LIGHTS
The Wave-Off Light (WOL) System (fig. 12-21)
Vertical drop-line lights are red and serve as an aft
provides a visual cue to the pilot that landing conditions
extension of the deck-installed line-up lights. The light
aboard the ship are unacceptable. The system consists
bar assembly is installed immediately aft of the landing
of the following nine major components:
line-up lights and contain four to six red lights which
1. Master control panel assembly
extend below the flight deck in the vertical plane. These
2. Two remote panel assemblies
lights in conjunction with the extended line-up lights
provide the helicopter pilot with continuous line up
3. Two plug-in junction box assemblies
during night approach when deck-installed line-up
4. Terminal junction box assembly
lights cannot be seen because of the ship's motion. The
5. Two wave-off light assemblies
drop-line bar assembly operates from a single
6. Portable switch
120/12-volt step-down transformer/enclosure assembly
which is wired to a motor-driven, variable voltage
Each of these components is discussed in detail in
the following paragraphs.
transformer (dimmer).
12-14
