Impressive numbers!

[YukonRon]

As we were cruising out of the marina today I glanced down at the chartplotter and did a double-take...GPS Speed was 55.7 kts at 1200 RPM! Wow! And only using 0.6 Gal/Hr, getting 100nm/gal for a range of over 3000nm on my remaining 30 gallons. Woohoo! Gotta love this economical Yanmar diesel!

Unfortunately, back at the slip I had started the engine without first turning on the breakers for the Nav equipment. I instantly had realized my mistake, shut down, the engine, and restarted the sequence by turning on the breakers first before restarting the engine. I thought everything was now normal, but obviously it was very confused.
After another complete shutdown and restart everything returned to normal.
I think I'll keep this picture around though; it could be useful when it comes time to sell the boat 😉

 

[Red Raven]

😀

 

[Brian98133]

That might be a tad incredulous... :mrgreen: But, as P.T. Barnum said: There's a sucker born every minute! :lol: :lol:

On the real side: I have been trying to figure out how to get my Garmin to show me my actual COG, which is what I assume is the dotted line in your pic?

Currently, my Garmin shows the orientation of the boat, regardless of travel. I would MUCH rather show my actual travelled course. I have hunted around, looking for a "COG" indicator, but to no avail!

Any input would be much appreciated! My last boat just came with the COG indicator standard, regardless of the boat's orientation.

Thanks!
Brian

 

[knotflying]

Are you referring to the breadcrumb trail, also called “tracking”? Take a look at this. https://support.garmin.com/en-US/?faq=kCclVbDAOF3LPOfo3ripX5

 

[Brian98133]

Are you referring to the breadcrumb trail, also called “tracking”? Take a look at this. https://support.garmin.com/en-US/?faq=kCclVbDAOF3LPOfo3ripX5

No, I've used breadcrumbs (or 'tracks'). I'm referring to a heading line (the actual path you're about to take). In other words, a line showing the actual path I am taking over ground, which is almost always different than the boat's centerline path due to wind and current. In the OP's pic, I assume the dotted line ahead of the boat is the actual COG, and the solid line is the boat's centerline? It might be visa versa.

If I have wind hitting my port whilst trying to navigate due north, for example... I'll have to 'crab' to the west to compensate. So my heading (or heading line in the Garmin) shows that I am moving at a heading of 330deg, even though the course over ground is 360/0.

My old Raymarine showed this, so I have to believe it's in Garmin? I just haven't been swift enough to find it :geek:

PS... I didn't intend to hijack the post, so if there's another thread that I couldn't find, please let me know.

 

[YukonRon]

I posted this for for fun, so no worries about hijacking. Especially if we can learn something from it.
I will look closer at the COG thing when I'm back at the boat. I don't think I've ever seen the dotted line except in this confused state. (other than the dotted track of where I've been, as mentioned, but that is different).
I have played with the "Chart Appearance" settings and tried "North Up", "Heading Up", and "Course Up" to see how it affects the pointer line in relation to how the boat is actually pointing, but I have not seen the dotted line. I have struggled with this too when the pointer doesn't match the direction you are travelling. I just accept that the plotter is showing the calculated course it needs to aim at, in order to get to the place you are heading for, adjusting for crabbing with wind and current. It would be nice though to see both lines.

 

[Red Raven]

Ron,

On our 7215 if I recall correctly there is a configuration for the “Heading line”. You can change the range that it extends as well as the heading “source”. If you choose “GPS” (I’m not sure of the exact wording as I am not on the boat), it will extend the heading line in the direction of actual travel and not the direction to which the boat is pointed. I leave our boat in this setting all the time. I believe this is equivalent to the COG you are looking for. This heading line, however has nothing to do with the dotted line in the photo posted by the OP. As far as I can tell the dotted line is a “track” possibly from a previous trip.

Curt