The launching system control is the control, power distribution, and test center for the GMLS. The main components are the EP1, EP2, and EP3 panels located within the launcher control station (fig. 7-13). Other components in or near the launcher control station are the power transfer device (PTD), an intercommunication unit, a strikedown hand control, a clinometer, a safety observer switch, jacks, and receptacles. The strikedown and safety switch receptacle and a telephone jack are mounted outside the control station.

Power Panel, EP1

The EP1 panel (fig. 7-14) is the power distribution unit for the launching system. This panel contains 115- and 440-VAC power indicators, circuit breaker on/off switches, fuses, elapsed time indicators, ground detection indicator, and system safety and power supply switches. The system safety and power supply switches

^{Figure 7-14.-Power panel, EP1.}

are a two-position rotary keylock switch that controls the system motors. In the SAFE position, the switch opens the start/run circuit of the motor. The key may be removed (and retained) by system personnel. This is a safety feature that prevents system operation when personnel are working around rotating machinery. A solenoid-operated latch locks the door when power is available to the panel.

Control Console, EP2

The EP2 control console (fig. 7-15) is the control unit for the GMLS. It contains the operating controls

Figure 7-15.-Control console, EP2.

and indicators on two angular sections on the upper part of the console. These controls and indicators allow the operator to select and monitor GMLS operation.

UPPER SECTION.- The upper section contains missile-related switches. The 40 dud assignment switches designate which RSR stations contain dud or normal missiles. Missile code and type assignment switches are thumbwheel switches that assign a designated missile numerical code to type A through type G missiles and T for the GMTR stowed on the RSR in the magazine. Also, rows of indicating lamps light up to display the load status of each station (cell) and identify which station is at the HOIST position.

The Harpoon casualty mode and firing safety switches are connected in the normal and emergency firing circuits. The firing safety switch is another rotary key-type switch. The key is removed in the SAFE position to inhibit the rocket motor firing circuit.

LOWER SECTION.- The lower section of the EP2 contains the launching system controls and indicators. The controls are push-button indicator switches used to activate and select the mode of control and type of GMLS operation. For normal auto/remote control operation, three primary control switch groups at the center of EP2 start the GMLS load-and-fire operation. The remote launcher control or local launcher control push button selects who has control over loading operations. If remote launcher control is selected, FCS controls loading and, if applicable, remote motor starting. In local launcher control, the EP2 operator has control of the system.

The other switches are used with the primary switch groups for motor activation, step, exercise, and test modes of system operation. The indicator lamp groups provide the console operator with information related to the launching system and missile status.

A timing code and logic status (TCLS) selection and display module is on the right side of the shelf. This module is used to troubleshoot and test GMLS operations. Physically, it is very similar to a pocket calculator in size and construction.

Push buttons on the TCLS let the operator enter numerical codes for obtaining information on equipment electrical status and for timing component operations. Light-emitting diode (LED) indicators display timing and circuit status according to the codes (numbers) punched (entered).