Chart distance question

[wdmso]

I have a question I did some chart distances from westport and newport

knowing Nautical mile are a bit longer .. but when i plug the waypoint into the GPS the 2 were not even close example Newport to SW ledge
the GPS had that at 28 miles? chart miles were 15nm which is 17 miles
and thats straight line distance its most likely me but didnt think i was that far off ..

I have the middle claw from westport chart miles as 14nm also anyone have the their numbers thanks wayne

[JFigliuolo]

Originally Posted by wdmso

I have a question I did some chart distances from westport and newport

knowing Nautical mile are a bit longer .. but when i plug the waypoint into the GPS the 2 were not even close example Newport to SW ledge
the GPS had that at 28 miles? chart miles were 15nm which is 17 miles
and thats straight line distance its most likely me but didnt think i was that far off ..

I have the middle claw from westport chart miles as 14nm also anyone have the their numbers thanks wayne

GPS looks right. Try http://webapp.navionics.com/#boating@8&key=okj%7BFnu_sL

[MakoMike]

Originally Posted by wdmso

I have a question I did some chart distances from westport and newport

knowing Nautical mile are a bit longer .. but when i plug the waypoint into the GPS the 2 were not even close example Newport to SW ledge
the GPS had that at 28 miles? chart miles were 15nm which is 17 miles
and thats straight line distance its most likely me but didnt think i was that far off ..

I have the middle claw from westport chart miles as 14nm also anyone have the their numbers thanks wayne

I don't know those places, but did you check the scale at the bottom of the chart and use dividers?

[wdmso]

Originally Posted by MakoMike

I don't know those places, but did you check the scale at the bottom of the chart and use dividers?

I think the issue is i used the North South long scale not the east west lat scale when i measured.. thanks

[beamie]

Originally Posted by wdmso

I think the issue is i used the North South long scale not the east west lat scale when i measured.. thanks

Not sure if you using some dry humor here or not.............but your suppose to use the NS long scale to measure distance.........it a mile a minute. 60 miles in a deg on long.

[wdmso]

Originally Posted by beamie

Not sure if you using some dry humor here or not.............but your suppose to use the NS long scale to measure distance.........it a mile a minute. 60 miles in a deg on long.

no Humor this was on the chart I used the NS long scale 1st time

I'll figure it out Just like to be in the ball park

[beamie]

Wow, those instructions are half wrong.....

The green part is correct.

But then is says use the east west latitude???? hmmmmmm. Try North South latitude.