The placement of an illuminated cable close to the deck is a good protection measure for long cables at low frequencies, which includes NEMP protection. The coupled pulse from a high-intensity NEMP illumination is not expected to cause damage on electric installations. It is shown that for exposed cable length of maximum 25 cm and not placed in the line of sight of transmitters above 400 MHz, no additional protection measures are needed.
Protection Against Common Mode Currents on Cables Exposed to HIRF or NEMP
Above deck, cables on naval ships are exposed to high-intensity radiated fields and nuclear electromagnetic pulse (NEMP) that may cause conducted interference and generate electromagnetic fields that exceed the immunity levels of commercially available equipment above and below deck. Exposed cables, such as open power plugs or lighting cables, are modeled and characterized both as a monopole antenna perpendicular to the deck and as a transmission line, representing a cable close to the deck.
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Damen Naval contracts RH Marine for new Anti-Submarine Warfare Frigates
Damen Naval has signed a contract with RH Marine as the first Dutch supplier for the new Anti-Submarine Warfare (ASW) Frigates. RH Marine will supply the Integrated Mission Management System (IMMS), the Integrated Navigation Bridge System (INBS) and the Integrated Platform Management System (IPMS) for each of the four frigates for the Dutch and Belgian navies. The announcement of the cooperation follows the official contract signing on 29 June between the Dutch Ministry of Defence and Damen for the design, construction, and delivery of the new frigates.
RH Marine upgrades systems on the Royal Netherlands Navy ampihibious transport vessel Zr.Ms. Johan de Witt
RH Marine has started with a system upgrade and maintenance of the Zr.Ms. Johan de Witt, the amphibious transport ship of the Royal Netherlands Navy. All navigation, communication, and control systems on board will be renewed and all electrical components will be inspected.