The first screenshot from Navionics from a windy day sailing my R22 on Milford Lake in Kansas.  While we had some lively sailing, the max speed of 6.4 knots exceeds anything I recall seeing on the knot meter.

Similarly, on a windy last day of chartering an Island Packet 440 coming back across Bellingham Bay from San Juan Islands, a max speed of 15.9 knots was recorded.  The max speed on the knot meter was 7.4 and the SOG according to the GPS on the chart plotter was a little over 9, so there was some current pushing us but nothing crazy.

I made the mistake of opening Navionics while I was riding in a car so my max speed recorded is over 61 knots :)


Screenshot_20211011-145150_Boating.jpg

Screenshot_20211011-145558_Boating.jpg

On Mon, Oct 11, 2021, 1:38 PM Mike Riter <mike at traildesign.com> wrote:

> I haven’t noticed Navionics returning a higher speed than what would be
> reasonable. Then again anytime I see a speed over 3 knots I’m elated. So if
> the app is misleading me, then I’m ok with that. 😁
>
> On Mon, Oct 11, 2021 at 2:16 PM Jesse Shumaker <
> jesse.laten.shumaker at gmail.com> wrote:
>
> > Hi Mike, I use Navionics as well.  I think it's a good value for the
> amount
> > of information.  It's nice to have a consistent navigation app to take
> with
> > when chartering, since chart plotters can vary widely, and it's also good
> > to have multiple sources of information in addition to chart books /
> paper
> > charts.  To avoid draining my cell battery for a nav app, I primarily use
> > the app on an iPod touch enclosed in a waterproof case that is bluetooth
> > paired to a Bad Elf GPS, and then I attach the iPod to my forearm with a
> > fitness arm band so it's always available and I don't have to worry about
> > dropping it.
> >
> > When I look back at a track over a day, I've noticed that my top speed on
> > Navionics tends to be higher than seems practical (on my R22 as well as
> > other boats).  Do you find this to be the case?
> >
> > Jesse Shumaker
> > S/V Zephyr
> >
> > On Mon, Oct 11, 2021 at 10:37 AM Mike Riter <mike at traildesign.com>
> wrote:
> >
> > > I use the Navionics app on my iPad (and iPhone as backup). Since Garmin
> > now
> > > owns Navionics, you can also access active captain to find local
> > services.
> > >
> > >  The iPad is attached to the starboard bulkhead handrail via a ram
> mount
> > > system with an adjustable arm so I can change the angle. Glare on the
> > > screen is the biggest issue with using a tablet or phone for
> navigation.
> > >
> > > On Sun, Oct 10, 2021 at 3:01 PM Lee Kuhn <lvjkuhn at gmail.com> wrote:
> > >
> > > > See attached.  Other similar options available.   Sits on galley or
> > > cockpit
> > > > seat without sliding, I think.
> > > >
> > > >
> > > > On Sun, Oct 10, 2021, 2:49 PM Graham Parker <gramille at tds.net>
> wrote:
> > > >
> > > > > Thanks Lee and Chris,
> > > > >  I have downloaded Boatspeed for 99c and will give it a try
> tomorrow!
> > > > > Anyone found a good method for holding/ displaying your iPhone
> while
> > > > > sailing without it baking or ending up in the drink? I am thinking
> > of a
> > > > > kind of suction cup  phone holder to put on the bulkhead?
> > > > > Graham Parker
> > > > > sv.00Sailin
> > > > >
> > > > > > On Oct 10, 2021, at 13:31, Chris Geankoplis <
> > > chrisgeankoplis at gmail.com
> > > > >
> > > > > wrote:
> > > > > >
> > > > > > I have used "boatspeed" for the last 1,000 nm on Enosis this
> summer
> > > and
> > > > > it
> > > > > > works fine.  There is a bit of mental interpolation as you get a
> > > > slightly
> > > > > > different speed every couple of seconds.  But it has been spot on
> > for
> > > > > > planning and sail adjustments.
> > > > > > Chris Geankoplis
> > > > > > Enosis
> > > > > >
> > > > > > On Sun, Oct 10, 2021 at 1:15 PM Lee Kuhn <lvjkuhn at gmail.com>
> > wrote:
> > > > > >
> > > > > >> See attached.   Best I found for an Android but I  think it
> works
> > > on a
> > > > > >> iPhone too.
> > > > > >>
> > > > > >> On Sun, Oct 10, 2021, 11:14 AM Graham Parker <gramille at tds.net>
> > > > wrote:
> > > > > >>
> > > > > >>>>
> > > > > >>>> Does anyone use their iPhone for monitoring sailing speed?
> > > > > >>>
> > > > > >>>> Which app. works best and has anyone found a iPhone holder
> that
> > > > could
> > > > > >>> attach easily near my compass on the bulkhead?
> > > > > >>>
> > > > > >>> Graham
> > > > > >>> sv.00Sailin
> > > > > >>>
> > > > > >>>
> > > > > >> -------------- next part --------------
> > > > > >> A non-text attachment was scrubbed...
> > > > > >> Name: Screenshot_20211010-131034_Google Play Store.jpg
> > > > > >> Type: image/jpeg
> > > > > >> Size: 441722 bytes
> > > > > >> Desc: not available
> > > > > >> URL: <
> > > > > >>
> > > > >
> > > >
> > >
> >
> http://rhodes22.org/pipermail/rhodes22-list/attachments/20211010/fab11844/attachment.jpg
> > > > > >>>
> > > > > >>
> > > > >
> > > > >
> > > > -------------- next part --------------
> > > > A non-text attachment was scrubbed...
> > > > Name: Screenshot_20211010-145634_Chrome.jpg
> > > > Type: image/jpeg
> > > > Size: 765952 bytes
> > > > Desc: not available
> > > > URL: <
> > > >
> > >
> >
> http://rhodes22.org/pipermail/rhodes22-list/attachments/20211010/83d11f44/attachment.jpg
> > > > >
> > > >
> > > --
> > > Michael Riter
> > > President, Trail Design Specialists, Inc.
> > > Lead Instructor, Trail Master and mechanized training
> > > mike at traildesign.com
> > > 678-410-8021
> > >
> >
> --
> Michael Riter
> President, Trail Design Specialists, Inc.
> Lead Instructor, Trail Master and mechanized training
> mike at traildesign.com
> 678-410-8021
>