Mike Kanze wrote:
Of course it helps mightily if you have a reasonably accurate fix from the
ship before you launch - unlike the pre-launch (and pre-GPS) 40 nm-in-error
"fix" that the CORAL MARU gave a VA-95 crew during its 1975 cruise. (Sea
story previously shared in this NG.) If you don't know from where you
started, DR by itself isn't going to get you home. Worse if you THINK you
know from where you started - like the VA-95 crew, but are wrong and don't
know it.

We were doing blue water ops, and launched on an alert. I was a nugget
null-P in the E-2. The CAPC makes a big deal about grabbing an accurate
chart that's up to date before we going flying. We get airborne and he
opens the chart up...and it's all blue. Top to bottom, left to right. He
looks at it for a second, closes it back up and sticks it in the navbag
and says, "I guess we're there!"