Enemy ship view distance?

[Delta Wolf]

Hi Guys,

Bit of a newbie question here but is there a rule of thumb to the distance at which you can be spotted by a enemy ship whilst you are on the surface in SH3?.

In SH5 the ships would have like a ring around them on the nav map to show you there spotting distance.

Just want to know if there is a general distance so I know when to dive or if i can stay surfaced for a bit longer

Thanks guys