The Pulse Doppler worked on two bands, 1-45KHz and 45-90KHz and used a guard channel to perform range retraction in order to prevent premature firing from sea reflections. The development cost for Sea Wolf was £1.092 over 5 years, and £621 per fuze; the cost to develop this fuze for SeaSlug was estimated at £1.261 over four years and £1400 per fuze.
It was decided not to pursue any development of the capacitance fuze as it was believed that the boost motors would coat the missile with aluminium compounds which would be removed during the missile’s flight and so change the missile’s electrostatic capacitance.
The final option was based around the new VX 8568 sensor developed by Mullard which had a sensitivity of 0.4µW/cm2 and only needed cooling to -40°C as opposed to the GW17’s 77°K (-196°C). Development cost was estimated as £773,550 with a cost of £1150 per fuze plus £250 for the Mullard detectors. After due consideration this option was selected, but in the event none of these options were pursued and Seaslug Mk2 retained the SW42 fuze for the remainder of its service.
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Page last updated: 23rd February 2015.
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