I'm glad to see that someone besides me still knows how to do manuvering board (solutions). By hand no less. Navigation is not dead!
Anyway, the reason that I asked what I did earlier, about using a handheld (or fixed) GPS to calculate some of what you're after, is that back in the early 90's, we did exactly what I described using a friend's handheld, when we were delivering his boat from San Diego
to Dana Point
It's an uphill trip (100% to weather), & we were on a Newport
30', so we could use all the help that we could get. And with both of us being serious racers, we decided to try some new toys & tools. Thus I showed him how to input Dana Point
as our destination, & then pull up the various performance screens: SOG, COG, VMG, SMG, etc.
Then, with the GPS set to show VMG as the primary (info output), we played with footing off in 3-5 deg. increments in order to see what it did to our VMG. And similarly, whenver the AWS, or TW varied by any significant amount (2kts, or 3-5 deg.) we'd do the same thing with regards to our heading, & check our VMG again.
It was a fun experiment
, & also gave us some quality time on the helm
, practicing staying on course while using as little rudder
as possible, with zero distractions. Unlike when you're racing
, where sometimes there's too much noise
, or information for a helmsman to fully concentrate on just steering
While of course also letting us put together a mini set of polars for how his boat went to weather in the various conditions of the day. With his "enhanced" rig, & the main & the #1.
His rig was from a larger racer, & was about 10' taller than standard. Once we'd optimized it to fit with the sails
that came with it, & made & fitted some shrouds to it. So we were curious to test it, & get some performance data.
It was fun day of testing (especially for a delivery), as until the advent of cheap
GPS at that time, you needed a full B&G instrument suite in order to get the info that the handheld was giving us. And such instrument packages cost about what a mid-level new car did, back then.
Speaking of which, I'm curious to know what your instruments setup is like, if you don't mind. And posting
it may also help some others to assist you in figuring out how to "wire everything together" in a manner that'll let you easily call up the data that you want in real time.
Especially as I'm 95% sure that you already have the capability onboard with the hardware
& software that you currently have. It's just that I'm not fully up to speed on the latest stuff. Nor an electronic nav wizard.
That said, there are multiple ways to input Polars into OpenCPN
. Here are links to a few of them, as found via the OpenCPN
website's search function, where I typed in "Input Polars".
And no doubt, some other searches of the site, & software will turn up more info on this. Though this search also shows you how to sync up data from NMEA
instruments. And by virtue of doing so, it'll create a set of Polars for the boat in your nav software.
Polar | Official OpenCPN Homepage
NMEA Instruments | Official OpenCPN Homepage
With all of the other bells & whistles that this software, & that which comes with instruments, etc. have, I can't imagine that your gear
won't do what you're aiming for. Perhaps bribing the navigator from a racing boat's in order? And if you do, set up a video camera
to "take notes" for you, about what they do in order to get more, & better information out of your system.
Also, I'd reckon that most of the instrument manufacturer's websites have a good bit of information on this, as well as relevant links. Especially ones like B&G, NKE, as well as the next tier down.
Plus again, there will be a plethora of info over on SA forums on these topics. On that I'd wager immensely.
Good luck, & have fun playing with the toys. Just don't let them boss you around in terms of telling you how to drive the boat
Edit: Here's another helpful search from the OpenCPN website on Polars Search | Official OpenCPN Homepage