Operation Manual

2.4 Using the heading lock function
The IS20 Rudder and IS20 Compass instruments include
a heading lock function.
When this function is activated, the LCD will show
heading deviation compared to the vessel’s heading when
the function was activated.
Use the following procedure to activate the function:
1 Steer the vessel on selected heading
2 Press the Up/Down keys to select the Lock
function
3 Press the Enter key to display the Lock menu
item
4 Again press the Enter key to display current
heading which is flashing
5 Accept current heading by re-pressing the
Enter key, or change the heading with the
Up/Down keys followed by the Enter key
6 Confirm the selection and return to the lock
function display by re-pressing the Enter key
The instrument will keep the selected heading as
reference until a new heading is entered as described
above.
Operation | 13