I was agreeing with you Mike, It was me that didnt get my point across. As I said they have their place but shouldnt be relied upon...The amount of technology thats flowing into my other 'hobby' is astounding, not only can we track handlers on GPS mics on VHF there is a system to track the dogs, a new bit of software is having lots of success called SARLOC only works on smartphones but its there.
Having said all that it is a REQUIREMENT in the other 'hobby' that I can navigate to a high standard, anytime, night or day, and in all weathers (and we have) by manual means alone. If I ever get to the stage that I cant do that then its time to resign...