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LTD. No. 9-52, “ASHIHARA-CHO, NISHINOMIYA-CITY, JAPAN TELEPHONE: 0798-65-2111 CABLE :■ FURUNO NISHINOMIYA TELEX : 5644-325/326 FURUNO J TELEFAX: 0798-65-4200 (Gl/GH) YOUR LOCAL AGENT/DEALER INTRODUCTION Congratulations on your choice of the Furuno LC-90 Loran-C navigator. We are confident that you will enjoy many years of operation with this fine piece of equipment. For over 30 years Furuno Electric Company has enjoyed an enviable reputation for quality and reliability throughout the world. This dedication to excellence is furthered by our extensive global network of agents and dealers. The LC-90 Loran-C receiver is just one of many Furuno developments in the field of navigation. Its compact size and ease of installation and operation make it suitable for use on a wide variety of vessels. As with most modern instruments, time and experience are required to reap maximum benefit from your new receiver. To help you meet this end as quickly as possible, this manual is laid out in as "user friendly" a manner as possible. The first section covers Basic level operations and later sections cover Intermediate and Advanced operations. This unit is designed and constructed to ensure the user of many years of trouble-free operation. However, to obtain optimum performance from this equipment, we ask that you read and follow the recommended procedures for installation, operation and maintenance. No machine can perform to the utmost of its ability unless it is installed and maintained properly. We would appreciate feedback from you, the end-user, about whether we are achieving our purposes in this manual. Thank you for considering and purchasing Furuno equipment. CAUTION Although your Loran C receiver is capable of providing very accurate position data, no single navigational device should ever be solely relied upon. Position information obtained from Loran-C should always be doublechecked against other sources such as radar, visual and celestical sightings, sounding measurements, etc. to verify the reliability of the data. TABLE OF CONTENTS FEATURES ........................................................................................................................1 SPECIFICATIONS ............................................................................................................2 ELEMENTARY THEORY Basic Navigation ............................................................................................................4 How Loran-C Works ........................................................................................................6 OPERATIONAL OVERVIEW POWER ON/OFF and DIMMER ..................................................................................10 NUMERIC KEYS ..........................................................................................................10 OPERATING MODE/FUNCTION KEYS ......................................................................11 OTHER KEYS ..................................................................................................................11 SUMMARY OF MODES AND FUNCTIONS Primary Modes, Data Readouts: ........................................................................11 Primary Modes, Data Entry: ...............................................................................12 Secondary (#) Functions: ....................................................................................13 Typical Mode Screens ................................................................................................14 Typical Function Screens ..........................................................................................15 INSTALLATION GENERAL MOUNTING CONSIDERATIONS ..............................................................16 DETAILED INSTALLATION INSTRUCTIONS Antenna Coupler unit Installation ....................................................................17 Display Unit Installation ..................................................................................19 Power connection ......................................................................................................20 Ground connection ....................................................................................................20 TESTING AFTER INITIAL INSTALLATION ..................................................20 HOW TO COMBINE WITH AUXILIARY EQUIPMENT ........................................24 BASIC LEVEL OPERATIONS TURNING THE UNIT ON AND OFF ..................................................................26 INITIALIZING THE NAVIGATOR FOR YOUR OWN GEOGRAPHICAL AREA Clearing the Memory ..............................................................................................2G Initializing Latitude/Longitude (Function #1) ..........................................26 READING SPEED AND COURSE (S/C Mode) ....................................................28 Manual Entry of Magnetic Variation...