Raymarine Ray49E - Menu Mode Operation; DSC Call Operation

Chapter 3: General Operations 33
3.11 Menu Mode Operation
Press and release the MENU/DSC key while in standby mode to enter Menu
Mode.
Menu mode is fully described in Chapter 4.
3.12 DSC Call Operation
Press and hold the MENU/DSC key for greater than 3 seconds while in standby
operation mode to enter DSC Call Mode.
DSC Call mode is fully described in Chapter 5.