Min
Kota's I-Pilot Magic Revealed
By Lawrence Euteneier, Captain
Blind Fishing Boat .Com
The convergence of technologies such as
digital compasses, GPS, Sonar and chart
plotters has been attempted by many marine
companies over the years with mixed results.
However, I don't think any have hit the ball
out of the park quite so far as Johnson
Outdoors has with their new I-Pilot feature
available on certain Minn Kota trolling
motors. As someone who has been
experimenting with blending different
technologies to create accessible marine
navigation solutions, I'm a big fan.
Let's go back in time a bit first.
Integrating automated GPS steering into a
trolling motor had been tried before.
Raymarine attempted to use GPS to
automatically steer an electric trolling
motor about ten years back, but abandoned
the plan after test results demonstrated
that the margin of error associated with the
triangulation of GPS data acquired from
satellites often confused the motor in that
it didn't know which way to turn next. One
minute the calculated coordinates would
placed the boat several meters left of the
boat's actual position, and seconds later
indicate the boat was in another location
altogether.
I remember all too clearly my first sea
trials of a new talking GPS system for the
blind I was beta testing. I created a
personal "waypoint", the launch site, and
then proceeded to head 500 meters out
towards the centre of the lake using a
talking digital compass to maintain a course
heading. When I then attempted to navigate
back to the launch using the GPS system's
voice directions, I quickly grew concerned
when I received one contrary set of
instructions after another. The situation
only grew worse the slower I propelled my
Porta-Bote with the electric trolling motor.
My teenage son, who was along with me for
the ride, grew increasingly frustrated as I
turned the boat one way and then the other.
I did eventually figure out that I had to
keep my speed above a certain minimum to
ensure the boat travelled beyond the margin
of error prior to the unit calculating our
next position.
Minn
Kota has created a highly responsive and
accurate GPS-controlled electric trolling
motor by incorporating their digital compass
navigation technology (Auto-Pilot) into
their I-Pilot solution. There's little doubt
that the accuracy of GPS antennas have
improved over the years, but one needs to
either use multiple antennas, such as in the
case of farm machinery, or take the average
of multiple individual readings from a
single stationary receiver, to calculate a
precise position. Since there's only the one
GPS receiver built into the trolling motor
head and since it's unlikely that a boat can
maintain a fixed position long enough to
calculate an average, encorporating Minn
Kota's already proven digital compass
technology into the I-Pilot platform made a
lot of sense.
Further under-scoring Minn Kota's brilliance
by combining the two technologies is
I-Pilot's ability to know which way the
trolling motor is pointed at all times. GPS
on its own can only calculate which way a
boat or trolling motor is pointed once it
has travelled a certain distance an can
compare it's present location with where it
had been moments before. Since a digital
compass is located within the head of the
Minn Kota trolling motor, this key
information is instantly available to
I-Pilot.
When the I-Pilot begins steering the boat
along a course, it does this in two ways.
First, it either throws down new or reads
existing GPS coordinates that it wants to
navigate to, and second it takes a compass
reading so it knows which way the head of
the trolling motor is pointed in relation to
these GPS waypoints. It's only through the
use of the digital compass that the I-Pilot
knows immediately which way to turn the
motor to assume a course. The compass
continues to play a role in maintaining an
accurate course heading between GPS
waypoints allowing the boater to travel as
fast or slow as he/she wants. Needless to
say, all of this has added up to an absolute
killer ap for Minn Kota.
Minn Kota's not the only marine electronic
company out there who has created an auto
pilot type device. Garmin, Raymarine and
others offer solutions to fishers that link
their chart plotters to a device that either
assumes control over turning the steering
wheel of the boat, or pulling and pushing on
a tiller handle. These systems offer real
advantages in that the boater can actually
monitor visually on the chart plotter's
display, not only where the boat has been,
but where it will go next. It also makes it
possible to create a route on a chart
plotter and then have the auto pilot device
steer the course. Other features such as
turning figure eights over a selected
location while trolling is possible, but
none have the Minn Kota's I-Pilot's
capability of knowing exactly which way the
boat is pointed prior to getting underway,
and none offer the accuracy Minn Kota can
offer thanks to their blending of GPS and
digital compass technology.
Some years back Motor Guide was also
experimenting with auto-pilot trolling
motors. For several years they offered a
solution that combined auto-pilot steerage
with depth sounder readings. The boater
could actually request the Motor Guide to
steer a course based on a pre-determined
depth. The goal was to allow the Motor Guide
to automatically follow a specific depth
contour. Unfortunately, Motor Guide dropped
the technology after just a few short years
following their acquisition by Brunswick
Marine.
The next step for Minn Kota is to link their
Humminbird chart plotter / sounders to the
Minn Kota I-Pilot. Both are owned by Johnson
Outdoors. Minn Kota already has perfected
the wireless communication component of the
solution with their "Co Pilot" wireless
remote technology, which was integrated into
the I-Pilot's remote. This would allow
boaters to either create or select existing
tracks on their Humminbird displays, or
select a specific depth or contour to
follow, and then have steering coordinates
fed to the I-Pilot wirelessly. Matched with
their side imaging and down imaging
technology, this could make for an excellent
up-grade.
I-Pilot already has the option of saving up
to three 2-mile long tracks and three
"Spot-Lock" (anchorages) in the head of the
I-Pilot motor itself, but their engineers
have set a 1/4 mile limit to the distance an
I-Pilot will navigate on its own to return
to a pre-saved track or anchor point. I
guess they felt that since the boater had no
way of knowing what the return route might
entail, since I-Pilot offers no actual
display of a map with the pre-recorded
routes and anchor points, and since I-Pilot
isn't pre-loaded with Navionic maps, a
boater could easily find oneself attempting
to cross islands or points of land.
Obviously, this can't happen with a
pre-recorded route as the I-Pilot already
knows it safely negotiated the GPS
coordinates that it holds in its memory.
I-Pilot isn't perfect. For example, when you
direct I-Pilot to return to a pre-saved
track, it knows to navigate to the nearest
recorded waypoint along that track. It's
important to understand that a route isn't a
continuous line of GPS coordinates, but more
a "connect-the-dots" affair of a series of
waypoints. Thus, if the closest dot, or GPS
waypoint, is located behind the boat, but
you know the course you want the boat to
follow lies ahead, I-Pilot will first take
the boat back to the nearest waypoint, and
then execute a 180 degree turn to commence
navigating the track in the direction you
requested.
Did I already mention I-Pilot's ability to
hold the boat on a selected location to
within five feet? Ideal for drop-shotting or
vertical jigging.
It also has two options for navigating in a
straight line. The "Auto-Pilot" option uses
the digital compass, and the new "Advanced
Auto-Pilot" option which uses a combination
of digital compass and GPS coordinates. The
"Advantage" option addresses the issue of
drift, which the compass-based Auto-Pilot
can't fully compensate for on its own. Minn
Kota decided to offer both options in their
I-Pilot as the constant course corrections
required to hold a straight GPS course when
encountering strong cross winds or currents
can place more load on the trolling motor
batteries than the boater may want to
expend. The compass-based Auto-Pilot feature
is also ideal for keeping the bow pointed in
a desired general direction to execute a
controlled drift or when setting out a
trolling spread.
Minn Kota engineers were definitely thinking
multi-sensory when they designed the
I-Pilot's human / machine interface. Not
only are the buttons on the wireless remote
actual tactile representations of different
icons, there are tones that can be activated
to announce the different features. There's
also a small display on the remote. Who
knows, maybe voice output will be included
next; similar to that found on GPS systems
for motor vehicles. When it happens I'll be
the first to volunteer as a beta tester.