Raytheon Marine GmbH
High Seas Products
Raytheon Marine High SeasRaytheon Marine High Seas
Schulung: Logs
Kiel: 09. & 16.06.04Thomas Wolter
Raytheon Marine GmbH
High Seas ProductsBV
071
2.00
1782Der Engländer JOHN HAMILTON MOORE
beschreibt erstmals eine Logge mit nachschleppbarem Holzscheit (englisch =„log“) und
einer auslaufenden Leine, zusammen mit einem „Glas“ (Sanduhr), das 28 sec. lang läuft. Die Logleine
ist in Abständen mit Knoten markiert.
Raytheon Marine GmbH
High Seas ProductsBV
071
2.00
„WALKER“ -Log:
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High Seas Products
SAL - “Svenska Aktiebolaget Logg”
The first SAL-Log
Installed 1913 on the swedish vessel HYPERION
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Correlation SAL-Logs from Consilium Navigation
(first accustical Log installed in 1972)
SAL T2
Gate valve: 24kg , Transducer , Indicators, Electronic unit
Gate valve: 75kg, Transducer, Indicators, 2 Electronic units
Single axis Log (4 MHz) only WT Dual axis Log (4 MHz + 150kHz) WT and BT
Raytheon Marine GmbH
High Seas Products
Speed = distance / time
distance
Time
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High Seas Products
SOLAS / requirements
• Regulation 18: “Systems and equipment required to meet the requirements of reg.19 and 20 shall be of a type approved by the
Administration.
• Regulation 19, 2.3: “All ships of 300 gt and upwards and passenger ships irrespective of size shall …. be fitted with: speed and distance measuring device, or other means, to indicate speed and distance through water.”
• Regulation 19 2.9.2 Speed & distance measuring device over the ground forward and athwartship for all ships of 50.000gt and upwards
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Rules, regulations and directives
• The European Marine Equipment Directive, CE-, ”Wheel”-marks and IMO requirements for speed logs.
• IMO A.824(19) - Recommendation on performance standards for devices to indicate speed and distance
• IEC 61023 (MSC.96(72)) - Speed and distance measuring device through water
• IEC 60945 - Environmental and general requirements
• IMO A.823(19) Log and speed indicators providing inputs to ARPA/ATA equipment shall be capable of providing the ship’s speed through the water in the fore and aft direction.
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High Seas Products
Resolution MSC.96(72) (i)(adopted on 22 May 2000)
• Recommends Member Governments to ensure that: • (a) Devices to measure and indicate speed and distance installed on or after 1 July 2002 conform to
performance standards not inferior to those set out in the Annex to the present resolution.
• Introduction 1.1 Devices measuring speed and distance through the water should meet the performance standard in water of depth greater than 3 m beneath the keel. Devices measuring speed and distance over the ground should meet the performance standard in water of depth greater than 2 m beneath the keel.
Accuracy of measurement
• Errors in the measured and indicated speed, when the ship is operating free from shallow water effect and from the effects of wind, sea bottom type, current and tide, should not exceed the following:
• 1 for a digital display - 2% of the speed of the ship, or 0.2 knots, whichever is greater; and• 2 for an analogue display - 2.5% of the speed of the ship, or 0.25 knots, whichever is the greater;
and• 3 for output data transmission - 2% of the speed of the ship, or 0.2 knots, whichever is greater.
Raytheon Marine GmbH
High Seas Products
CORRELATION PRINZIP (Consilium SAL R1 and SAL T2)
Longitudinal speed measurement
12 cm4 MHzWater track
Measurement of speed through water and over ground 2-300 m
150 kHzBottom track
SAL R1
SAL T2
SAL T2
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SAL water track-element– 1 crystal
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Track Signals
S1 S2
HullHull
Piezo-electric elements
Projected bottom area
Acoustic beams from reflecting
objects in bottom back to
Transducer
Ahead
piezo-electric elements
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High Seas Products
Raytheon Marine GmbH
High Seas Products
1-Axis Sensor, elements at transducer from, SAL R1
S1S2
Longitudinal direction
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S1 S2
Hull Hull
4.2 MHz
25 V
3.8 MHz
25 V
Output signals (Single Axis) WT (SAL R1)
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High Seas Products
-0.25 -0.2 -0.15 -0.1 -0.05 0 0.05 0.10
1
2
3
4
5
6S1S2S3S4S5
Typical signals of 1-axis Sensors (SAL R1)
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Correlation measurement principle
Water Track
0,12 m
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SAL R1
Bridge area
Fore peak
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High Seas ProductsBlock diagram SAL R1
Standard-configuration Additional distribution (LDU)Log Distribution Unit
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SAL R1 – connection diagram
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SAL R1 bottom parts
Gate valve singe hull for SAL R1; 24kg
Transducer (2-elements) SAL R1
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High Seas Products
SAL R1 ELC
(Electronic Unit)
housing9,5kg
1x NMEA output
optional: mit R1P converter board
1x analog output
4x 200p/nm
Standard indicator:
SD 1-7 (0,6kg)
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High Seas Products
Analogindicator SIA-2-8
• Standard dimensions DIN 144 x 144 mm • Range: - 8 to 30 kn• With LED-illumination
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(Boundary layer)
Ship´s hull
0U
Ship´sSpeed
V
Inside BoundaryLayer
Relative water Speed
Outside boundary layer(Relative water speed = U)
Next to hull: Relativewater speed = 0
At 1/2 boundary layer: Relative water speed = 90%U
At boundary layer edge: Relative water speed = 100%U
Next to hull: relativ water speed = 0
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Calibration
Raytheon Marine GmbH
High Seas Products