The Raymarine Wireless Micro Compass gives you a massive racing advantage. It is light, easy to read, reliable and precise. The Micro Compass's tactical scale gives you clear stable figures for port and starboard tacks. When tacking, the readings are always the same, meaning you never have to remember numbers.
Since the introduction of digital compasses to the ILCA class, you will struggle to find a top ILCA sailor who doesn't use one. You can read all about the advantages of using a compass while racing here. The fact is, in a one design class like the ILCA, every edge matters, and if you're not tracking the wind shifts accurately, you're missing out.