+ <!-- The electric system of latest ship has becom the most important
+ on a ship. It poeeres all other systems and provides electrical
+ power to all kind of commercials and cabins including interior and
+ exterior lights. So you should be adviced to provide emergency
+ systems and redudancy for this system. //-->
+ <electric-system>
+ </electric-system>
+ <!-- On latest ships you require to have a hydric system to operate
+ heavy bulkheads which seperates sections on low-level decks. On
+ passenger ships the hydraulic system have to operate front and/or
+ rear doors to let drive vehicles in. //-->