Raymarine e7 User Reference page 131

Menu item
Sea Temperature
Waypoint Arrival
Using alarms and MOB functions
Description
When set to On, triggers an alarm when the sea temperature is
equal to or lower than the limit you specify for the Lower Temp
Limit or equal to or greater than the limit you specify for the
Upper Temp Limit setting.
When you arrive at a waypoint, an alarm is triggered. This
setting allows you to specify the distance from the target
waypoint at which the alarm is triggered. The units used for this
setting are based on the units you specify for distance in the
Units Set-up menu.
Options
Sea Temperature
• Off (default)
• On
Lower Temp Limit
• 60 degrees fahrenheit (or equivalent units)
• –09.9 to +99.7 degrees fahrenheit (or equivalent
units)
Upper Temp Limit
• 75 degrees fahrenheit (or equivalent units)
• –09.7 to 99.9 degrees fahrenheit (or equivalent
units)
0.01 to 9.99 nm (or equivalent units)
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