High temperature for sea water

[josefronteira]

My B&G Network quad is displaying very high sea water temperature ( 26 or 27 C when real temperature should not excede 19 C) as a bonus when used as A Voltmeter reading are lower that the real ones (12,4 Volt when real is 12,6).Any ideias about the reasons for this behaviour?

 

[Graham_Wright]

My B&G Network quad is displaying very high sea water temperature ( 26 or 27 C when real temperature should not excede 19 C) as a bonus when used as A Voltmeter reading are lower that the real ones (12,4 Volt when real is 12,6).Any ideias about the reasons for this behaviour?

Are you moored near a sewer outfall?

 

[Colvic Watson]

Are you moored near a sewer outfall?

Do a thorough check, don't just go through the motions.

 

[sailorman]

i have 2 x Raymarine Multi`s both give different voltage`s & temp`s. I dont use these functions on them as i deem them to be inaccurate