Running Team or Slip-Seat: Does Each Driver Need Their Own GPS Profile?

A shared truck is a shared set of assumptions, and navigation is where those assumptions collide first. Two drivers, one navigator: one of them set the vehicle profile for a 13'6" van, the other pulls a flat deck with a load that measures taller. One saved a shipper's real gate as a favourite, the other overwrote it with the office address across the highway. One planned breaks around a clock that is not the other one's clock.

None of that is a device defect. It is what happens when a tool designed around one driver's habits gets handed to two. The question worth answering is not whether to buy two navigators — it is which parts of the setup genuinely have to be per-driver, and which parts should be locked down and shared no matter who is in the seat.

What actually goes wrong when two drivers share one navigator?

Four failure patterns show up on dispatch calls, in rough order of how expensive they are.

• Stale vehicle dimensions. The most dangerous one. Truck navigators route around low bridges and weight restrictions using the height, weight, and length you entered. Change trailers, add a taller load, or drop a heavy reefer for a light van and nobody updates the profile — now the routing is confidently wrong in the direction that hits a bridge
• Overwritten saved places. Shippers with a receiving gate three blocks from the mailing address are everywhere. One driver saves the gate, the next saves the address, and the truck arrives somewhere with no truck entrance at 4 a.m
• Recent-destination noise. On a team truck the recents list is two people's history interleaved, which makes the fast "pick the last one" workflow a coin flip
• Timer and break assumptions. Break planning, arrival estimates, and reminder features are built around one person's clock. On a team truck they are describing whoever last touched the screen

The first item is the only one with a safety consequence, and it is worth being blunt about: a navigator is an aid, not an authority. Posted signage wins, always. A stale profile is a contributing factor to a strike, never an excuse for one, and it will not read as one on a report.

Do truck GPS units even support multiple profiles?

Here is the part that surprises drivers: yes, but not the way they expect. Purpose-built truck navigators — the Garmin dezl OTR line among them — support multiple vehicle profiles. You can store a set of dimensions for the day-cab and van, another for the flat deck, another for the heavy-haul configuration, and switch between them. That solves the dangerous problem.

What they generally do not offer is a driver account: a login that swaps your favourites, your recents, your settings, and your history for mine. Saved places are device-level. So the honest answer to "does each driver need their own profile" is layered. Each configuration needs its own vehicle profile, and that is non-negotiable. Each driver needs their own personal layer — and on a shared device, the practical way to get one is to keep it on a phone rather than on the dash unit.

The features worth having on the shared device are the ones that help both drivers equally: dimension-aware routing, aerial views of docks and gates so you can see the truck entrance before you commit to a turn, community-rated truck parking so the off-going driver is not hunting a spot at midnight, and warnings for sharp curves and high wind. Those are truck facts, not personal preferences, and they do not need to be duplicated per driver.

Which settings are safe to share, and which are not?

Draw the line at "does this describe the truck, or the person?"

Share and standardise: vehicle profiles by trailer configuration, avoidance settings for toll and ferry preferences your operation actually has, units, and any customer gates saved with a consistent naming convention. Standardising the naming is the underrated one — "ACME – RECEIVING GATE (TRUCKS)" is unambiguous at 4 a.m. in a way that "Acme 2" is not.

Keep personal: recent destinations, home address, preferred fuel network, parking preferences, break reminders, and any hours-of-service tooling. That last one deserves emphasis. The compliance record of what you drove and when lives in the ELD, not in a navigator, and the two should never be treated as interchangeable — especially on a team truck where driver assignment is the thing auditors examine first. Our ELD mandate guide covers how driver assignment and unassigned driving time are supposed to work, and a team operation that gets sloppy about logging in and out creates exactly the ambiguity described in our HOS violation defence guide.

The single most valuable habit for a shared truck is putting the profile check into the walkaround. Trailer swapped, load height changed, weight changed — confirm the active vehicle profile matches before the wheels turn. It belongs alongside the rest of the sequence in our pre-trip inspection guide, takes about ten seconds, and it is the only step on this page that prevents a bridge strike.

Is a second unit worth it, or is a second mount the real fix?

For the overwhelming majority of team and slip-seat trucks, a second navigator is the wrong purchase. It duplicates the one setting you least want duplicated — vehicle dimensions — while solving a problem (my favourites versus yours) that a phone already solves better and syncs to the cloud for free.

There are two situations where two units genuinely make sense. The first is a true slip-seat operation where drivers move between different tractors rather than sharing one: then the navigator is personal equipment that travels with the driver, and each driver maintains their own profiles for whatever they are pulling that week. The second is a team running a large screen where the off-going driver wants to plan the next leg from the bunk without touching the active route — and even there, a tablet or phone usually does the planning job.

What is almost always worth buying is a second mount. On a shared truck, two people have different seat positions, different eyeline, and different opinions about where a screen belongs. A mount that gets wrestled into a new position twice a day loosens, sags, and eventually drops a device into the footwell mid-route. Two dedicated mounting points — or one mount with a genuinely repeatable adjustment — ends that.

What does the phone do in a slip-seat truck?

It carries the personal layer. Load board, ELD app, parking and fuel apps, messages with dispatch, your own saved places, your own history. It logs in as you and logs out as you, which is exactly what a shared dash-mounted navigator cannot do. Treat the navigator as truck equipment and the phone as driver equipment, and most of the shared-truck friction disappears.

That makes the phone mount a real piece of equipment rather than an accessory. In a class 8 cab the windshield sits far from the seat, so a mount needs a long enough arm to bring the screen into a usable position without blocking your view of the mirrors, a grip that holds a large phone with a case on it through washboard pavement, and ball joints that damp vibration instead of transmitting it. Suction cups also behave differently in a truck than a car — cold glass and road film are what release them, so clean the glass properly, and use an adhesive disk on textured dash plastic rather than fighting a bad suction seat.

How should a team or slip-seat truck be set up?

The setup that holds up over a year looks like this. One purpose-built truck navigator mounted where both drivers can see it, carrying vehicle profiles built per trailer configuration and a shared, consistently named list of customer gates. A profile check in the walkaround every time the trailer or load height changes. One phone mount per driver position — or one mount with a repeatable adjustment — so the personal layer has a home that does not require renegotiating the dash every shift.

Then agree on two rules and write them somewhere in the cab. First: nobody deletes or renames a saved place that the other driver created — add a new one instead. Second: the ELD gets logged out and back in at every handoff, without exception, because unassigned driving time on a team truck is the fastest way to turn a clean operation into an audit conversation.

Buy the second navigator only when the drivers genuinely stop sharing a truck. Until then, the shared device is not the problem — the shared assumptions are, and those get fixed with a naming convention, a walkaround step, and a mount for each person's phone.