Raymarine RL70C Owner's Handbook Manual page 6

iv HSB Series LCD Display
Raytheon equipment, guidelines are given at appropriate points throughout this
handbook to enable you to ensure minimum interaction between different items
of equipment, i.e. ensure optimum Electromagnetic Compatibility (EMC).
The design and manufacture of Raytheon equipment and accessories conform
to the appropriate EMC standards, but correct installation is required to ensure
that performance is not compromised.