HYPRO DRIVE ML+/HS+ LINEAR DRIVES VOLTAGE CONVERSION KIT. Marine Autopilot Steering Systems. Suitable for use with ML/HS+ Steering Systems. Pumps used on ML+40, HS+40 & HS+50. (12 Volt 100 watt) – 12 volt Pumps 1.0 to 2.5 litre & 12 volt ML+ & HS+ Drives. (24 Volt 100 watt) – 24 volt Pumps 1.0 to 2.5 litre & 24 volt ML+ & HS+ Drives. The Service Centre is the largest independent marine electronics service facility in Europe providing service and repair facilities directly to companies such as Simrad, Navico, Navman, MX & Cetrek and are authorised service agents for many more including Raymarine & Icom.