L L Errors

These last several years, I have been spoiled by GPSs and MFDs and really have not scratched LOPs on a chart in a while.
Since my youth working paper charts, I used Degrees, Minutes, Seconds.
Verbally, I would even say all out loud 80 degrees, 20 minutes, 15 seconds west.
Written it would look like 80°20'15" W. I have also used 80°;20;15 W.


These last few years I have observed my old method and;
degrees, minutes, decimal minutes
degrees, decimal degrees
These were easy to understand but if precision was needed. I would type (copy/paste) whatever the format into my Dell dash computer and it would make a plot for me.
Never really needed much precision in a while, I aim for 30N, 81W and always got home.
But between these 3 standards (and others) if misinterpreted could be hundreds of yards or maybe miles in error.
This could be bad if I had to call for help and who ever I was talking to used a different format than myself.


But wait, there's more.

I get these emails from the USCG/Space-Force.
Security areas off shore for rocket launches.
I figure here I would find their standard, adjust my devices to display the same and start practicing my communications more correctly.
I just further confused myself.
What format is; " 28-37-54.93N/080-36-53.64W 28-40-00N/080-36-00W "



So my questions to the forum;
What is the more modern/correct L L format?
What the heck does a dash mean?


Thx
Caveman Ralph

54.93 seconds.
Crazy.

So, using degrees, minutes, seconds, just with dashes.
Is this still the normal mode to communicate L L?

And no, just degrees gets me to a familiar inlet.
Probably why I don't like pennies.

Thx Ken