Norma
Water Injection Vessel
FEATURES
- This versatile vessel can operate in either water injection mode or as a plough boat
- Water injection is achieved via two lowpressure water pumps which circulatewater to a specially designed injection head fitted with multiple water jets.
- The combined output of these pumps is up to 7400m3 per hour.
- The injection head is brought into contact with the seabed and a pre-determined thickness fluidised.
- Accurate horizontal positioning and track plotting is achieved using DGPS to enable targeted dredging.
- Vertical control is achieved using tidal data transmitted from shore together with digital ladder depth indication.
- Twin Scottel azimuth thrusters permit a high degree of manoeuvrability with the ability to dredge accurately and in confined areas.
MAIN DATA
| Year of construction | 1981 - major upgrade 2008 |
| Working areas | Sheltered waters |
| Length overall | 27.00m |
| Length BPP | 18.80m |
| Width | 9.50m |
| Depth moulded | 3.00m |
| Draught | 2.15m |
| Main propulsion | 625 kW (850 h.p.) |
| Manoeuvring Propulsion | 2 No. Schottels: 2 x 220 kW (2x300 h.p.) |
| Bowthruster | 120 kW (160 h.p.) |
| Jetting Head max depth | 19.0m |
| Jetting Head max width | 8.80m |