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2. 4.5-inch Mark 8 naval gun - Wikipedia

   en.wikipedia.org/wiki/4.5-inch_Mark_8_naval_gun

   A new type of 4.5 inch gun with a longer 55-calibre barrel, it was designed in the 1960s for the Royal Navy's new classes of frigates and destroyers.The weapon, built by Vickers Ltd Armament Division, was developed by the Royal Armament Research and Development Establishment using the Ordnance, QF 105 mm L13 of the Abbot self-propelled gun as a starting point (it used electrical primers).

3. QF 4.5-inch howitzer - Wikipedia

   en.wikipedia.org/wiki/QF_4.5-inch_howitzer

   The Ordnance QF 4.5-inch howitzer was the standard British Empire field (or "light") howitzer of the First World War era. It replaced the BL 5-inch howitzer and equipped some 25% of the field artillery. It entered service in 1910 and remained in service through the interwar period and was last used in the field by British forces in early 1942.

4. StarFire (navigation system) - Wikipedia

   en.wikipedia.org/wiki/StarFire_(navigation_system)

   StarFire is a wide-area differential GPS developed by John Deere's NavCom and precision farming groups. StarFire broadcasts additional "correction information" over satellite L-band frequencies around the world, allowing a StarFire-equipped receiver to produce position measurements accurate to well under one meter, with typical accuracy over a 24-hour period being under 4.5 cm. StarFire is ...

5. QF 4.5-inch Mk I – V naval gun - Wikipedia

   en.wikipedia.org/wiki/QF_4.5-inch_Mk_I_–_V...

   From the BL Mark I gun of 1916 the 4.7-inch (120 mm) calibre was the mid-calibre weapon of the Royal Navy, used particularly on destroyers.Apart from some ships armed with QF 4-inch Mk V guns due to shortages, it remained the standard weapon for destroyers up to the W-class destroyers of 1943.

6. QF 4.7-inch Mk IX & XII naval gun - Wikipedia

   en.wikipedia.org/wiki/QF_4.7-inch_Mk_IX_&_XII...

   The 4.7 inch calibre was superseded by the 4.5 inch calibre on the Z-class destroyers in 1943. The new 4.5 inch guns all had 55-degree elevation mounts and fired a shell slightly heavier than that of 4.7-inch Mk IX and XII guns, although slightly lighter than that fired by the 4.7 inch Mk XI gun.

7. Garmin G1000 - Wikipedia

   en.wikipedia.org/wiki/Garmin_G1000

   The GIA unit is a combined communications and navigation radio, and also serves as the primary data aggregator for the G1000 system. It provides a two-way VHF communications transceiver, a VHF navigation receiver with glideslope, a GPS receiver, and a variety of supporting processors. Each unit is paired with a GDU display, which acts as a ...