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. The red segments around the rim (4 seconds red - 1 second white) were for the automatic alarm on 500 kHz. If the alarm circuit could not trigger the alarm signal and key the transmitter, the Wireless Officer was supposed to press the Morse key in the red segments and lift the key in the white segments. 5 such long dashes would then trigger the auto-alarm circuits in the wireless office on other ships as well as in the coastal radio stations, and the Wireless Officer would not have to think in a distress situation.
Radio room clocks have traditionally been marked with the sectors as guidance for the operators.
Case overall diameter is 6", overall depth 2.5", face diameter (inside) is 3.25", outside face diameter is 4.75". Quartz clock movements use one AA battery.
For in-stock items despatched from our own warehouse, we offer three UK delivery options:
Standard UK Delivery: £4.99. On this service, goods will usually arrive within 14 days of your order reaching us, and often in less than 10. (Please remember that if you posted your order it may have taken up to five days to get here).
3-Day Delivery: £6.99. This is a three-working-day (not Saturday, Sunday, or Bank Holidays) service for UK mainland and Ulster addresses, provided that you order before 1pm. Orders received after 1pm will be processed on the next working day, so take one day longer to arrive. If you require an item to be personalised, your order will be delayed by one working day.
Express Delivery: £9.99. This is a next-working-day (not Saturday, Sunday, or Bank Holidays) service for UK mainland and Ulster addresses, provided that you order before 1pm. Orders received after 1pm will be processed on the next working day, so take one day longer to arrive. Service to Scotland, Northern Ireland, Isle of Wight and other UK Islands takes two days. If you require an item to be personalised, your order will take an additional working day. Your package will arrive between 9am and 6pm (may be up to 8pm), and must be signed for on receipt, so please give an address where there will be somebody available to take delivery (perhaps a neighbour/friend, or your workplace if your employer permits this).
For items despatched by third party suppliers
Admiralty chart prints and aircraft models/cufflinks made from original materials are sent to you directly from the makers, and are offered on a Standard delivery service only - please allow 7-10 days. These items are marked with a 7-10 day delivery icon below.
Delivery Information (Overseas)
We are currently unable to deliver to EU addresses due to the high and unpredictable costs, customs charges, and courier handling fees. Our other overseas delivery charges (standard service only) are:
Channel Islands (7-10 Days), £20
Rest of World. From about £50, depending on what you order. Please phone on +44 1932 235550 or e-mail us on mailorder@nauticalia.com for a quote. Outside Europe, most orders arrive within 21 days.
VAT (sales tax) will be deducted from the listed price of your goods where applicable for customers outside the UK, including those from the Channel Islands.
