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Glossary

B
BLAC Motor
Brushless Alternating Current Motor
BMS
Battery Management System – A special control mechanism integrated in Seacraft batteries, providing safe and stable battery operation.
Boost
A special gear (+) of Sseacraft > scooters, accelerating the propeller to the maximum possible RPM (depending on battery level), in order to use the advantages of decreasing dynamic resistance due to increased water flow.
Bracket
A fixture mounted on a Seacraft scooter, in order to attach accessory components.
D
DPC
Diver Propulsion Craft – An extension to the classical > DPV, offering higher speed, range and / or payload.
DPV
Diver Propulsion Vehicle – A device (also called > “Scooter”) to propel a diver under water, mostly driven by an electric engine.
Dead-reckoning
A navigation method based on extrapolation of bearing and depth. The Seacraft > ENC uses this principle for underwater navigation.
Double Tap
Feature of Seacraft > scooters allowing for fast acceleration / return to the previously selected gear.
E
ENC
Electronic Navigation Console – An underwater navigation aid by Seacraft based on the > dead-reckoning principle, allowing for recording and following routes under water.
F
Firmware
Seacraft scooters and navigation consoles offer an on-board computer, controlled by a special software. This offers the possibility to upgrade the device with new features.
H
Handle-Up Position
Feature of Seacract > scooters, where the battery’s centre of gravity makes sure that the scooter always remains upright, so the control handles are on top.
Hermetic charging port
A specially sealed charging port on Seacraft > scooters, to protect the unit’s electronics up to a depth of 100 m in case the user forgets to close the charging port plug.
L
Li-Ion
Lithium-Ion – a battery technology.
P
POM
Polyoxymethylene – Thermoplasstic polymer
Post-Swirl Stator
A removable, rigid component placed behind the > scooter’s propeller, diverting the water flow caused by the propeller in order to eliminate any torque that would impair the scooter’s manoeuvrability.
Power converter
An optional accessory for Seacraft > scooters to convert the battery voltage of max. 37,5 V down to 12 V, so the diver may use the > E/O power outlet, in order to supply external components (e.g. > SLS2 or a heating vest) from the scooter’s battery.
R
Reverse Gear
A Seacraft specialty: If activated, a Seacraft scooter offers you a reverse gear.
S
SLS2

SLS2
Seacraft Light System 2 – A set of underwater lights for Seacraft > scooters, powered by the scooter’s main battery.
Scooter
A device (also called “DPV” – Diver propulsion Vehicle) to propel a diver under water, mostly driven by an electric engine.
Speed sensor
A component of the > ENC (Electronic Navigation Console) to measure the current speed of the scooter and the distance traveled, in order to calculate the diver’s position under water based on the > dead-reckoning principle.
T
Time Lock
A safety feature of Seacraft > scooters, where the scooter’s gear display returns to 0 after a programmable time (3-60 s).
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