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SMALLGYROCOMPASS MODEL GM-20/21

INTRODUCTION

Now, thanks to the employment of state-of-the-art TOKIMEC technology, even operatore of small commercial vessels and fishing doats can enjoy the advantages

of a gyrocompass for heading reference-and do so at reasonable cost. Of course, as the specially designed GM-20/21 gives gyrocompass benefits, it also eliminates the inconveniences associated with conventional magnetic compasses.

The GM-20/21 features a synchro output, which can be used to drive the companion TOKIMEC PR-1500 Steering Control for decidedly low cost autopilot steering. There's also an automatic preset startup feature with a 24-hour range, so the GM-20/21 can

be made all ready to go for the next trip. In addition, if a synchro amplifier is used

with the GM-21, up to three repeater compasses can be connected. The GM-20/21

is comprised of a master compass, which is normally mounted on top of the static

inverter. If available space is limited, the static inverter can be remotely located on

the bulkhead.

FEATURES

	Compact Design The GM-20/21 measures only 228 x 321 x 377 mm, so it can be easily installed on fishing boats and other small commercial vessels.
	Low Power Consumption Power consumption is only 50 VA (for master compass).
	Ease Of Operation
	Direct Reading And Synchro Output Direct reading simplifies use considerably, and synchro output provides for low-cost autopilot steering.
	Three Repeater Compass Circuits
	Automatic Preset Startup A 24-hour timer permits automatic startup.

SPECIFICATIONS

Power Supply	AC 100/110, 1Ø, 50/60 Hz, 60 VA (for repeater compass) DC 24 V, 2 A (with only master commercial vessels. compass running)
Voltage Fluctuation	± 20%
Ambient Temperature	+50°C to -20°C
North-seeking Accuracy	Within ±2°
Follow-up Accuracy	Within  ±0.1°
Setting Time	Less than 4 hours
Mechanical Freedom	± 45'
Maximum Turning Follow Up Speed	Turning ratio of 10 sec/rev
Repeater	90X synchro motor (3 circuits)

NOTE: Design and specification are subject to change without prior notice, and
without any obligation on the part of the macnufacturer.