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Your Local Agent/Dealer Your Local Agent/Dealer 9-52 Ashihara-cho, 9-52 Ashihara-cho, Nishinomi Nishinomiy ya, Ja a, Jap pan an Tele Telep phone : hone : 0798-65-2111 0798-65-2111 Telefax : Telefax : 0798-65-4200 0798-65-4200 FIRST EDITION : FIRST EDITION : FEB. FEB. 1997 1997 A All ri ll rig ghts reserved. hts reserved. Printed in Japan Printed in Japan C : C : MAY. MAY. 13,2002 13,2002 PUB.No. PUB.No. OME-72440 OME-72440 *00080797601* *00080797601* *00080797601* *00080797601*
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SAFETY INSTRUCTIONS "DANGER", "WARNING" and "CAUTION" notices appear throughout this manual. It is the responsibility of the operator of the equipment to read, understand and follow these no- tices. If you have any questions regarding these safety instructions, please contact a FURUNO agent or dealer. This notice indicates a potentially hazardous situation which, if not avoided, will result in death or DANGER serious injury. This notice indicates a potentially hazardous situation which, if not a
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WARNING CAUTION Do not place liquid-filled containers on Do not open the cover of the top of the equipment. the equipment. Fire or electrical shock can result if a liquid This equipment uses high spills into the equipment. voltage electricity which can shock, burn, or cause death. Do not place heater near the equipment. Only qualified personnel should work inside the Heat can melt the power cord, which can equipment. result in fire or electrical shock. Do not disassemble or modify the
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CONTENTS SAFETY INSTRUCTIONS ________________________________ i to ii TABLES FOR RECORDING USER PRESETS _______________ v to x CHAPTER 1. GENERAL_______________________________1-1 to 1-8 1. FEATURES ..................................................................................... 1-1 2. PRINCIPLE OF MEASUREMENT .................................................. 1-2 3. TIDE, NAV-TIDE & TIDE DIFFERENTIAL....................................... 1-5 CHAPTER 2. OPERATION __________________________
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TIDE VECTOR/COURSE PLOT SECTION.....................................3-10 to 3-15 TIDE VECTOR Display ...................................................................... 3-10 TIDE HISTORY Display ......................................................................3-11 COURSE PLOT Display .................................................................... 3-12 TIDE EFFECT Display ....................................................................... 3-13 DRIFT Display ......................
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TABLES FOR RECORDING USER PRESETS The CI-30/35H provides menus to preset, various measuring and display conditions to customize the equipment precisely for your operating conditions. The form below is provided to record user presets, so they can be restored in the event of loss by misoperation or by maintenance/service work. 1) BASIC MENU (Display/measuring conditions) [MENU 1] ITEM USER PRESET : selected FAC. SETTING REF TIDE DIF LAYER1 LAYER2 LAYER3 LAYER1 1 min 2 min 3 min 4 mi
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USER PRESET : selected FAC. SETTING ITEM * TIME DATA INT EXT INT WT SPEED T/D NAV-TIDE T/D NAV FORMAT CIF NMEA CIF * * NAV AID LORAN-C LORAN-A GPS DECCA DR ALL ALL * NAV DATA L/L SPD SPD TIME INT * [ ] min 1 to 10 min (in 1 min steps) 1 min CRS CAL MODE * GT NAV MAN MAN * CRS CAL EXEC START To start calibration, select START and press EVENT key. - - * TIDE OUT INT 15 sec 30 sec 1 min 2 min 5 min 10 min 15 sec 2) RANGE MENU (Speed/distance/depth ranges) ITEM USER PRESET
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[READ THIS FIRST!!] IMPORTANT NOTICE ON TIDE MEASUREMENTS (In nav-aided mode, tide accuracy depends heavily on gyro accuracy.) SETTING SHIP’S HEADING The CI-35/35H has the nav-aided mode to measure absolute tides even in deep waters where ground tracking is unattainable. To achieve reliable measurements, however, you must supply accurate heading (gyro) information and ship’s position (or speed/course) data to the CI-35/35H. If you are going to use nav-aided mode, set the reading of the AD conver
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CALIBRATING COURSE OFFSET (Automatic) A. When ground-tracking is attainable: 1. Make sure the navaid (GPS) is working correctly and accurately. 2. On CI-35/35H, select ground tracking mode. (Press the TRACKING MODE key to see the “GT” mode indication on the display.) 3. In Menu 4, set ‘CRS CAL MODE’ to “GT”. 4. Run your boat at a speed about 10 kts, keeping the same direction. To minimize the effect of gyro speed error, it is desirable to run along parallels (i.e., eastward or westward). 5. In
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WHY IS GYRO DATA IMPORTANT IN NAV-AIDED MODE? If you consider the difference of tide vector calculations is ground-tracking mode and in nav-aided mode, you will realize how important the gyro (heading) information is. Tide Calculation in Ground-Tracking Mode In ground-tracking mode, the CI-35/35H derives tide information from the following data. : True bearing of ship’s bow (ref. north) θ A θ H: Gyro reading (1) Ship’s speed/course based on ground θ G: Direction of ground speed (ref. bow) (groun
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Tide Calculation in Nav-Aided Mode In nav-aided mode, the CI-35/35H derives tide information from the following data. (1) Ship’s speed/course sensed by the external navigator (GPS) (nav speed = pseudo ground speed) (2) Ship’s speed/course based on target layer θ A: True bearing of ship’s bow (ref. north) (water speed) θ H : Gyro reading θ N : True bearing of nav speed (ref. north) (3) Bearing of ship’s bow θ W : Direction of water speed (ref. bow) (Heading by gyro) Here, nav speed (1) is the shi
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CHAPTER 1. GENERAL 1. FEATURES ¡ The functions of CI-35 and CI-35H are same. CI-35H is type approved by MOT (Ministory of Transportation). ¡ Even in deep waters where ground (bottom) reference is not available acoustically, the CI-35/ 35H can provide absolute movements of measuring layers by receiving position (or speed) data from GPS navigator and heading data from gyro compass. It may be used on deep sea fishing boats or on ocean research vessels. ¡ The CI-35/35H consists of three major units;
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2. PRINCIPLE OF MEASUREMENT When a moving vessel emits an acoustical pulse into the water at an angle, a portion of emitted energy is reflected from the seabed and other microscopic objects in the sound path, such as plank- ton or air bubbles. The frequency of the received signal is shifted from the transmitted frequency in proportion to relative velocity between the vessel and underwater reflecting objects. This is called Doppler Effect. The CI-35/35H calculates and displays movements of ship a
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Tide Tide is movement of watermass at a particular depth. To know absolute tide (speed on ground), the following two data are required: 1 Ship’s speed and course based on ground 2 Ship’s speed and course based on measuring layer (A) Absolute tide is, then, given as a difference of these two speed vectors. Absolute Tide = 1 - 2 w Layer (A) q :Base of measurement Fixed Nav-Tide Nav-Tide is an absolute movement of watermass at a particular depth, taking speed information from the external navigat
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Tide Differential Tide differential is a relative movement of tides at different depths, layer (A) and layer (B). To calculate tide differential, the following two data are used: 1 Ship’s speed and course based on layer (A) 2 Ship’s speed and course based on layer (B) Tide differential between two layers is, then, given as a difference of these two speed vectors. Tide Difference = 1 - 2 (Movement of layer B based on layer A) or = 2 - 1 (Movement of layer A based on layer B) q Layer (A) w Layer (
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3. TIDE, NAV-TIDE & TIDE DIFFERENTIAL Tide (Absolute tide) Absolute tide can be measured in the ground tracking mode. 10 NM (1 hour trip) Start of End of trip trip (Moving at 10 kt on ground) q Layer A (Moving at 3 kt on ground) w :Base of measurement Fixed Assume that the ship and layer A are moving in the same direction, and ship’s speeds based on ground (Vg) and on layer A (Vwa) are measured as; Vg = 10 kt (Ship’s speed based on ground) Vwa = 7 kt (Ship’s speed based on layer A). Speed of l
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Tide Differential Tide differential is a relative movement of tides at different depths. It can be measured in the ground tracking, water tracking and nav-aided modes. 10 NM (1 hour trip) Start of End of trip trip w Layer A e (Moving) :Base of measurement Layer B (Moving) 2 kt 5 kt Assuming that the ship, layer A and layer B are moving in the same direction, and ship’s speeds based on layer A (Vwa) and on layer B (Vwb) are measured as; Vwa = 8 kt (Ship’s speed based on layer A) Vwb = 5 kt (Ship’
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Cd = C1 - C2 = (Vg - Vwa) - (Vg - Vwb) = Vwb - Vwa Tide differential based on layer B = 5 - 8 Speed of layer A viewed from layer B = -3 (kt) In the water tracking mode, watermass just below the transducer (near-surface layer) is taken as the base of all measurements (virtual ground). Therefore, the ship and tide speeds in the water tracking mode are not absolute but relative to this near-surface layer. Vw = 9 kt (Ship’s speed based on near-surface layer) Vwa = 8 kt (Ship’s speed based on layer A
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Tide differential calculations in water tracking mode Tide speeds of layer A (C1) and layer B (C2) relative to near-surface layer (Vw) are calculated as follows: D1 = Vw - Vwa (Speed of layer A based on near-surface layer) D2 = Vw - Vwb (Speed of layer B based on near-surface layer) The tide differential (Dd) between layers A and layer B is; Dd = D2 - D1 = (Vw - Vwb) - (Vw - Vwa) Tide differential based on layer A = Vwa - Vwb Speed of layer B viewed from = 8 - 5 layer A = 3 (kt) or Dd = D1 - D2
