Locating directions on the high seas is fundamental to navigation. Our ancestros relied on the stars, but    today we measure the direction aboard ship in celestial observation, magnetic compasses,    gyrocompasses and GPS ways. Of these, the primary instrument for locating directions is the    gyrocompass. Each method has its own strengths and weaknesses, but the gyrocompass can be    widely used in all types of vessels, from small boats to large ships.

	TG-8000/8500   Conforms with the standards of IMO   Superior durability   High accuracy   Compatible with another equipment
	ES-110/GM-21   Small sized, Light weighted   Superior durability   Low maintenance   Compatible with another equipment