ENC is a powerful navigational aid, if handled correctly by the user.
One of the often underestimated, yet crucial factors is good compass calibration, and avoiding magnetic interferencies.
As ENC bases it’s guidance on “dead-reckoning”, compass indication should be as close to reality as possible.
In order to do this- correct device calibration is recommended even before each dive.
Did you know that 5 degrees error, on distance of 1000m, leads to almost 90m error?
In order to lear how it is best to calibrate your device- see video below: