Operating the scooter – 3.0

Starting the scooter

The scooter is equipped with a contactless main ON / OFF switch located in front of the nozzle on the cylindrical part of the scooter (drawing 1, pos. 16).

After setting the switch to the On position, on the OLED display located on the handle of the scooter the following will appear in sequence:

Manufacturer logo

Settings, depending on mode

When activating the Direct Start function, screens 2A and 2B are not displayed when switching on the scooter (→ Setting the Security Options – Direct Start).

Abbreviations used in screen 2A and 2B

Max powerMaximum power of the scooter set by the user
Possible range: 60-100% (→ Setting the Maximum Scooter Power).
DynamicsDrive characteristics: Constant RPM / Constant Torque (→ Setting the Drive Dynamics).
Time lockTime set by the user, after which the release of the handle will automatically block the scooter by selecting gear [0]
(possible range: 3-60 seconds) and transiting to Standby mode (→ Setting the Security Options – Time Lock).
Two-handed – screen 2AThe control mode set by the user – scooter controlled with two hands (→ Setting the Security Options – One-handed / Two-Handed Steering).
One-handed – screen 2BThe control mode set by the user – scooter controlled with one hand (→ Setting the Security Options – One-handed / Two-Handed Steering).

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Methods to control the scooter

The user may choose from these control methods:

  • Two-handed steering – The scooter is controlled with two hands
  • One-handed steering – The scooter is controlled with one hand

For safety reasons, the manufacturer recommends selecting the two-handed control mode (the variant indicated on the display of the scooter as “Two-handed”).

It is the factory setting in every Seacraft scooter.

Selecting the “Two-handed” mode means that to turn on the motor of the scooter the user must simultaneously press the buttons on the left and right side (→ drawing 1, pos. 6) of the control handle.

In order to be able to use the scooter with one hand (variant indicated on the display of the scooter as “One-handed”) the factory settings must be changed. Information about changing the default setting to “One-handed” appears on the display screen as the red warning “One-handed”. For a description of how to change the mode (→ Setting the Security Options – One-handed / Two-Handed Steering).

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3 steps to start driving

For safety reasons, the process of starting the scooter requires 3 steps:

  1. Activating the machine with the main switch introduces the scooter in Blocked mode and does not allow the scooter to work.
  2. Unlocking Blocked mode takes you to Standby mode (gear [0]), which also does not allow the scooter to work.
  3. In order to start the scooter’s motor it is necessary to select gear [1-9] or reverse gear [R] and to press any button (One-Handed mode) or both buttons (Two-Handed mode) on the scooter steering handles (→ drawing 1, pos. 6, 7).

Transition from Blocked mode to Standby mode

Blocked mode screen

To switch from Blocked mode to the main menu in Standby mode, proceed as follows:

  • Simultaneously hold the two buttons on the scooter steering handles for 3 seconds
    (→ drawing 1 pos. 6, 7).

After completing the above steps, screen 4 (Standby mode) is shown on the display:

Standby mode screen

This screen indicates the gear currently selected (“0” yellow), the battery icon showing the percentage of the battery charge (0-100%) and the current working hours of the scooter motor in minutes.

In this mode, pressing any button on the scooter steering handles will not activate the scooter motor, because there is no gear selected.

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Transition from Standby mode to Blocked mode

To avoid unwanted activation of the motor, while performing other tasks during a dive, activate the Blocked mode. To do so, switch to gear [0], and hold both buttons on the steering handle down for 3 seconds.

Setting the scooter gear

The scooter is capable of operating in “10 + 2” gears (gear [0-9], overspeed [+] and reverse [R]). After starting, the scooter automatically is in Standby mode (gear [0]) in which the scooter motor does not run. Shifting gear is possible using two piezo buttons (→ drawing 2, pos. 18, 19) located directly above the display (→ drawing 2, pos. 20).

Pressing the top piezo button (→ drawing 2, pos. 18) causes the gear to move higher and pressing the bottom button (→ drawing 2, pos. 19) will lower it. Each pressing changes the gears by one step.

The user may configure the maximum power output of the scooter.  
Hence you might not always experience the “real” power the scooter is capable of, when selecting a gear (→ Setting the Maximum Scooter Power).

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Capacity-dependent maximum gear

For the safety of users, to optimize the scooter’s energy consumption, and to extend the its range, the motor controller will possibly limit the maximum available gear:

  • At 34-100% of the available capacity of the battery, the battery on the screen 5 is green, it is possible to run in every gear.
  • At 15-33% of the available capacity of the battery, the battery on the screen 5 turns orange, it is possible to run in maximum gear [7].
  • With less than 15% of the available capacity of the battery, the battery on screen 5 turns red and it is possible to run in maximum gear [5].

Overspeed gear (Boost)

The scooter provides you with a special overspeed gear [+], that uses all available power to drive the propeller to the maximum RPM (revolutions per minute) possible in the given situation.

The overspeed gear [+] can be activated by pushing the button 18 while running in gear [9].

The maximum possible RPM depend on several factors, such as battery status, battery/motor temperature, maximum power setting etc. Hence, the maximum possible RPM will vary.

Make use of the overspeed gear advisedly, since this gear puts a considerable load on battery and motor.  

Repeated use of this gear will reduce the scooter’s range faster, which might collide with your dive plan.

Be aware, that driving the scooter at high speed requires your full attention and shortens the available reaction time.

Reverse gear

The reverse gear [R] is a Seacraft specialty, unknown with other scooters on the market.

Using this gear faces you with new challenges, so make yourself familiar with them (→ And Yet One More Seacraft Specialty: The Reverse Gear).

Please note, that the reverse gear [R] is only available when it has been activated in the scooter configuration (→ Setting the Security Options – Reverse Unlock).

The reverse gear [R] is only available after setting gear [0], when the propeller has stopped, and pressing button 19.

Use the reverse gear [R] with caution and only for short periods, since the propeller will slightly bend in the opposite direction compared to normal use.  
This could lead to the propeller touching the stator.

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Automatic re-set to Standby mode

Leaving the scooter without any operation (no pressure on the buttons / and the steering handle) for a period longer than the preset auto-lock time (“Time Lock” function) will automatically set the scooter into gear [0] in Standby mode.

Time Lock is an important safety feature which protects the user against accidental and unintentional powering on the motor during its use under water (→ Setting the Security Options – Time Lock).

Seamless gearshift

Changing the scooter gear happens smoothly (without any jolt).

If irregularities are found when changing gears or operating the scooter during a dive, the user should immediately return to base by selecting the shortest safe route. Consider having the scooter serviced by an authorized service point.

Starting the motor

After setting a gear, the motor can be started, depending on the selected mode.

You may configure, how fast the scooter motor will reach the maximum speed of the selected gear by changing the dynamics setting (→ Setting the Gear Dynamics (Acceleration)).

This is a comfort setting to adapt the scooter’s behavior to your personal preferences and also a practical feature for students.

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Screen 4B shows the estimated remaining run time, based on the current engine load.
The internal electronics measures the average current drain, and every 6s it will calculate how many minutes of driving time remain at this level.

The calculate is based on measuring the estimated remaining battery capacity, taking into account the installed battery type (which must therefore be chosen carefully in the settings.

The displayed remaining runtime is only indicative only and should not be used as a basis for any decisions, that could influence your life. Remember to abide by all dive-planning rules learned in your DPV training.

However, should you have to re-plan your dive on short notice or encounter an unusual situation (e.g. towing a partner in variable currents), the remaining run time might be a critical tool, supporting you in selecting the optimum speed.

When the engine load drops below 1.5A (approx. 50W, depending on the battery status), the remaining run time will not be displayed. The same applies, if the DPV is not being driven under water.

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Two-handed mode

In case the user chooses control with both hands (Two-Handed mode), the scooter can be operated only with both hands, i. e. the user needs to press both buttons to start the engine (recommended for beginners).

One-Handed Mode

In case the user chooses control with only one hand (One-Handed mode) the scooter can be operated with one hand or both hands. This mode implies that to start operating the scooter can be done by pressing either button on the steering handle.

This also means that the propeller will spin as long as the gear is not 0 and at least one button is pressed. This allows for changing the hand that controls the scooter on the way.

The One-Handed control mode indicates an increased risk of the other hand or body damage in case of unforeseen circumstances and accidental touch of the propeller.

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Fast Unlock

When the Fast Unlock function is activated and scooter is in gear [0] (Standby mode), it is possible to quickly start the scooter with the last-used gear.

To do this, press either the left or right button on the steering handle twice in less than 0.5 seconds.

Setting the Security Options – Fast Unlock.

Instant Acceleration

When using gears 1-8 and having one of the buttons on the steering handle pressed, the user simultaneously presses the other button on the steering handle twice and quickly – like a “double click” with a computer mouse. Then, the scooter will immediately shift gear to the highest possible gear, i.e. [9], [7] or [5], depending on the battery status.

The time between taps on the button must be less than 0.5 sec.  
Rapid gear acceleration is only available with Fast Unlock function enabled.

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To return to the gear before the acceleration, simply repeat the “double tap” on one side.

This function allows you to quickly switch back and forth between 2 gears while driving, e.g. for a short sprint.

Use this function advisedly in order to avoid dangerous situations.

Showing / Hiding Parameters on the Way

Quickly press and release both buttons on the control handles (less than 1 second) will display the operating parameters of the scooter on screen 5:

Parameter display

In addition to the gear number (yellow), the following additional information is displayed:

32.8 Voperating voltage (V)
560Wpower drain (W)
44%humidity in electronics chamber (%)
25⁰Ccontrol system temperature (⁰C)
980 rmotor revolutions (RPM)
257’current motor working hours (minute)

Should you notice a humidity value of more than 70 % during your dive, it is recommended to return to base using the shortest safe route.  
When you have returned to shore, check the inside of the scooter for humidity.
Also, check the seals for contamination and damage.

A hint to optimize your position behind the scooter:  

If you are familiar with the scooter (and not distracted by other tasks), take a look at the current used while driving the scooter. The more resistance you put against the scooter, the more amps it will need.

So, if you optimize your position behind the scooter, the displayed amp value will drop.

In this way, the scooter offers you an integrated “trim optimization” display.

In order to hide these parameters again, simultaneously, quickly press and release both buttons on the control handles (less than 1 second).

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Stopping the motor

In order to stop the scooter temporarily, just release the buttons on the steering handle.
The scooter motor will stop immediately. Pressing any button on the steering handle again during the time range shorter than the one set on screen 7C1 (Time lock option, 3-60 seconds range) will allow to activate the motor and thus continue driving.

To stop the scooter for a longer period, switch to Standby mode follows:

  • Set gear [0] using button 19 at the display or
  • Wait for scooter Auto Lock to happen, without pressing any button on the steering handle.

As a result of each of the abovementioned actions the scooter gear will be reset to [0], the scooter will go into Standby mode. In such case even if the user accidentally presses the steering handle it will not activate the scooter’s motor.

Parking the scooter under water

To stop the scooter under water and secure it against accidental power-on, the user should put it in Standby or Blocked mode (→ Transition From Standby Mode to Blocked Mode). This can be done (depending on needs and situation) in the following ways:

  • Set gear [0] using button 19 at the display or
  • Wait for scooter Time Lock to happen, without pressing any button on the steering handle (→ Setting the Security Options – Time Lock).
  • Turn off the scooter using the main switch.

Please note that disabling with the main switch is the safest form of stopping
the scooter.  

After completion of a dive with the scooter, always turn off the scooter by setting the main switch to the OFF position.

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Next: Configuring the scooter >

Updated on 2022-05-26

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