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Brass 'Fitzroy' Radio Silence Clock

£110.00

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Our Radio Silence range have cases with super durable, tarnish-free coating and QuickFix fitting system (see explanations below). Brief Explanation of Radio Silence Clocks: Tragically, the radio-signalling equipment carried by RMS Titanic was of little use, since the distress signals sent after hitting an iceberg in 1912 went unheard for several hours. The disaster spurred an international review of maritime safety which made several recommendations, one of which led to the introduction of radio silence periods. These are three-minute periods immediately following each quarter hour reserved exclusively for making, and listening for, distress calls. The green sectors represent silence periods on the SSB (Single Side Band)) distress frequency of 2182kHz, as carried by commercial and some pleasure craft. The red sectors are for Morse code distress signals on the 500kHz band, as used in radio telegraphy. Radio room clocks have traditionally been marked with the sectors as guidance for the operators. Case diameter 6", depth 1.5". Quartz clock movements use one AA battery.

Brass

Brass - an alloy of copper and zinc - is easy to work with, can be polished to a gleaming shine, and it has a high degree of corrosion resistance, making it the traditional choice of metal for use in harsh marine environments.

Quick Fix

The unique QuickFix system allows the instrument to be locked hard to a bulkhead or wall but removed, in seconds, by hand. The instrument is supplied with a base plate which is screwed to the wall or bulkhead (instructions and drill hole template included). The instrument then simply slots over the base plate and with a gentle twist, is locked on. A reverse twist removes it again. This makes changing batteries easy, removal for storage easy, and avoids the tricky job of not scratching your polished case when screwing the instrument to the wall! QuickFix can also act to seal clock mechanisms making them waterproof.

Tarnish Resistant

Tarnish-free instruments have been coated with a newly developed protective coating using advanced surface treatment technology. Far superior to lacquers and varnishes, it can withstand more than 720 hours (the longest test period for this process) under NSS (Neutral Sea Salt) laboratory testing. NSS testing is a certificated and standardised test method used to check corrosion resistance of coatings on metals such as brass, zinc and steel. This means your instruments will stay looking good for longer even when exposed to the harsh marine environment for extended periods.

Quartz Movement

Quartz (silicon dioxide) crystals possess the remarkable property of oscillating at a very regular and predictable frequency when subjected to an electrical current. The first commercially available clocks to exploit this appeared in the late 1920s, and went on to supersede mechanical movements thanks to their accuracy and reduced need for maintenance.

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Do you have a specific question about this product? Please use our question and answer form to find out more or call us on 01932 235550.

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