Speed Calibration (Advanced, With Temp/Speed Only); Time Format (Advanced, International Only) - Humminbird 586C Operation Manual

Speed Calibration will adjust the speed readout by the percentage entered,
and will appear in the menu if a Temp/Speed Accessory is connected and the
paddlewheel has moved at least once, and when the User Mode is set to
Advanced (see Main Menu: User Mode).
To change the Speed Calibration setting:
1. Make sure the User Mode is set to Advanced, then highlight Speed
Calibration on the Setup main menu.
2. Press the LEFT or RIGHT Cursor keys to change the Speed Calibration
setting. (-20% to +20%, Default = 0%)
Time Format changes the time format used by the unit. This menu option is
available when the User Mode is set to Advanced (see Main Menu: User
Mode). International Models only.
Time Format selects a 12 hour or 24 hour format for the time of day displayed
when Time + Date is selected as a Digital Readout on the Sonar View (see
Setup Menu Tab: Select Readouts).
To change the Time Format:
1. Make sure the User Mode is set to Advanced, then highlight Time
Format on the Setup main menu.
2. Press the LEFT or RIGHT Cursor keys to change the Time Format. (12
hour, 24 hour, Default = 12 hour)
Speed Calibration
(Advanced, with Temp/Speed only)
Time Format
(Advanced, International only)
57 Setup Menu Tab