CVAR : Conduction-Cooled VME processor And Receiver
MDMS: Mission Data Management System
TISIS   : Tactical Integrated Sensor Information System

The MDMS is the conduction-cooled variant of the General Dynamics Canada (GDC) mission system also fitted on the CP-140 Aurora.  The MDMS for the CH-148 is made up of:

* Mission Data Management Computer (MDMC - the GDC sales brochure refers to calls it TISIS).
* Tactical Workstation Console (TWC) which contains the:

- Workstation tactical display (2)
- Programmable Entry Panel displays (2)
- Cockpit Tactical display (CTD)
- Cockpit Cursor Device (CCD) – the “potato grip”

MDMS interfaces to the sensors and tactical data link systems, runs the tactical workstation displays in the cabin and cockpit, and manages and monitors the health of the integrated mission system (IMS).

The CVAR, is the helicopter’s acoustic processing system for both the Sonobuoy processing and the Dipping Sonar system, and it contains the receiver for the sonobuoys.  The system control and display is done from the Workstation Tactical Display (WTD), the Programmable Entry Panel (PEP) at the Tactical Workstation Console (TWC) in the cabin.

The TWC is the composite material console in the main cabin where the TACCO and SENSO sit.  Each operator has two displays in front of them.  The WTD is the larger 20.1 inch LCD that provides the tactical and sensor displays, and the PEP is the smaller, 10 inch display positioned at an angle, which presents the software-driven menus to operate the mission systems.
 

---

Credits and References:

1) Jeff Jobb <jjobb(at)sympatico.ca>
2) General Dynamics Canada product brochures

May 16/11