Instruments
21 June 2019 | 220 Miles South of Kangaroo Island
Day 14 7:30pm Friday 21st June 2019 ( UTC+9 )
The sailing has been very quiet and despite indications at dusk that the wind was going to swing around to the North fickle breezes and calms have left me no option but to ignore them and get on with the blog.
Though I am quite capable of shooting the sun and stars I decided not to carry a sextant as there are so many instruments and backups aboard that accurate lat/long is always available. By way of explanation both Iridium units constantly put out GPS as do both iPhones ( when coaxed ) . My primary chart plotter is a Lowrance HDS 7m which is connected via the proprietary Raymarine SeaTalk bus to the Raymarine 200 autopilot, Raymarine St 60 wind, Raymarine St 50 speed, ( via paddle wheel ) log, depth and temperature. The Lowrance is particularly noted for its intuitive operation and there is a vast amount of information available from the whole system which all integrates flawlessly. I have a ST 100 remote wireless controller for the autopilot which again integrates with the system to follow heading, track or wind. The backup chart plotter is a Chinese Onwa with free open source charts for the world downloadable via the web. While the charts aren't as detailed as the Navionics they are more than adequate for the purpose. This Onwa plotter also includes an AIS transceiver which details the ships on the plotter and has a whole range of options for warnings etc, but purposely is not interconnected with the other system in case of any clash. A very important and independent system is an Echomax Active X- Band Radar Enhancer. The transponder unit is mounted vertically on the push pit about 2 metres above water level and does not interfere with the Onwa GPS aerial, The Iridium aerial or the VHF aerial. When lit up by a passing radar it displays a green light on the panel and a loud, ( mutable ) alarm, a quieter ( mutable ) alarm. It also instantly returns an enhanced echo which has the echo size of a small coaster and is obvious to the ships watch while a fibreglass yacht is barely discernible beyond 2 miles. Fishing boat radars are detected and replied to at about 8 miles, well out of sight, and ships radars at over 16 miles.
Not strictly instrumentation but included here are Navigation lights. On the masthead is a 3 LED tricolour plus all round anchor light, on the doghouse are Port, Starboard and Stern lights as an alternative plus above the lower spreaders a forward facing steaming light for requirements under power and a foredeck light. All these are LED and quite bright with very low power consumption. Also all cabin lights are LED with the main galley light, which is really bright, is for cooking and reading.
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