Page 47 - Yachter Autumn 2021

THE COMMUNICATIONS FIT
Radios
• Icom M505 Marine DSCVHF • Icom MarineVHF H/H
• Yaesu FT-450D (HF)
• Yaesu Ftm 100de (2m & 70cm) • Baofeng GT-5p 2m/70cm H/H • Garex 4001 (4m)
• Wouxun KG-UVD1P 4/2m H/H • Iridium Go Satcom
Other equipment
• Fc-40 tuner in lazarette (aft locker), 10m of 8mm stainless steel insulated length of backstay
• KISS Counterpoise port side aft (inside the boat)
• Sintered bronze ground plate starboard aft (underwater, attached to the hull)
• VHF antennae on pushpit
• Combined marine VHF and AIS antenna
at masthead (12m above sea level)
• Hawkins Viper / Thunderbolt Antennae for 2m, 4m, 6m & 10m suspended from
main halyard, when not underway
Other electronic equipment
A well-equipped yacht can have a myriad of other electronic equipment, much of which has the potential for electromagnetic interference if not carefully managed.All of this equipment is necessarily installed in a confined space and is in close proximity to each other and the radios – our max length is only just over 10m, and max beam 3m.
Electromagnetic noise in harbour is normally greater than at sea, with potential additional sources from:
• 230V shorepower supply to vessel • Neighbouring craft
• Harbour wide Wi-Fi • Waterside premises
The geography can also present challenges, with potential for shielding from surrounding buildings, or even from mudbanks at low water.
FEATURE 47