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Bus de Mer de La Rochelle

(La Rochelle Seabus)


The very first marine seabus with zero emission


The two seabus provide a shuttle service between La Rochelle old harbour and Les Minimes marina. Doing so, they sail at 6 knots through the channel subject to westerly wind, waves and tide stream. During rush hours, each bus performs 15 travels without any recharge, covering a total distance of 70 km.

The new bow shape allows to go smoothly through the choppy sea and passenger cabin has been lowered to reduce windage and to increase range.

Passengers appreciate the all around sight provided by the glass cabin and the extraordinary quietness of the aft deck.

Thanks to the immersed rotating pods and to the hook system, ships can maneuver very easily inside the marina.

With La Rochelle seabus, Alt.en shows that it is now possible to provide a regular marine service carrying 75 passengers using a zero emission electric propulsion.

Facts

  • Located in La Rochelle
  • 3 km trip
  • Marine navigation

Technical specifications


Structure  
Ship type Catamaran
Construction Fiberglass & polyester FRP
Cabin Aluminium (Nacira Design)
Platform #2 (50 to 100 passengers)
   
Main specifications  
Length 15 m - 49'
Beam 5.00 m - 16'5''
Light disp. 12 T - 32,150 lbs
Full disp. 19 T - 51,000 lbs
Draft 0.7m to 1.2m - 28" to 47"
Freeboard 0.7 m - 28" (1.0 m at bow)
Available area 68 m² - 735 ft²
Passengers 75
Seats 75
Wheelchair 2
Cycle 4
Crew 2
Classification Bureau Véritas (BV), Passenger boat
   
Energy and propulsion  
Engine 2 immersed pods
Power 2 x 22 kW
Battery technology Ni/Cd
Battery pack capacity 130 kW/h
Battery pack weight 2250 kg - 6,030 lbs
Full recharge time 7 h
Photovoltaic panel 26 m² - 280 ft² 3.4 kWc
   
Performance
Maximum speed 9.5 knots
Radius of gyration < 5m - 15 ft
Battery running time 8 h**
Battery range 100 km - 62 m
Consumption per passenger 18 Wh/km - 0.08 MJ/km









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