Then why do the climate faithful only start their Arctic ice record in 1979 instead of 1970 when it was being well documented?
Erm, the arctic record goes back further than 1970. You didn't know this? Huh.
Yes, but it is inconsistent, thus it is not reliable, thus it is relegated to hearsay evidence. 1970 is when systematic, ACCURATE measurements began. What is science? MEASUREMENT. That is what science is about. You didn't know this? Huh.
This makes the goofy assumption that ships in the area prior to 1970 did not have accurate thermometers or scientists on them who knew how to read and record one. That really is a stupid assumption not based on reality. Try again.
No, this makes the very accurate assumption that what records there were were limited and inconsistent. There was no linear record at all. It was limited measurements taken at random times, and varied locations.
The fact is that ship measurements at various locations around the world have been used for years. A measurement taken at a location in the middle of the Atlantic at a certain time of day is just as relevant as any other measurement. and your claim that they were taken at random times is not supported by the facts. And even if they were, so what? You've never created scientific graphs, have you? Of course not. You just pretend that you have.
Random temperature measurements are just that....random. They provide nothing useful in terms of continuity. Continuity is what matters when you are measuring something.