Ricerocket,
I don’t think that the Di sonar is only 20 degrees. The specs that someone else posted show it as 86 degrees at 455kHz and 55 degrees at 800kHz. Still I have not seen anything in writing from someone at Humminbird so all specs are still “suspect” to me.



DonDon,
I don’t know but would bet that they are always massaging the software to improve it.