A question for you experienced nautical people. During the time of Titanic with the navigational equipment they had and if they did everything right, just how accurate were their positional fixes and what was deemed accurate? I was reading some of the threads and was going blind looking at and trying to understand all the numbers. Was it a quarter mile...half mile or more? My economy model hand held GPS usually gets me within 10 to 20 feet. I know they couldn't be that accurate. But what was acceptable?