Raytheon Marine GmbH High Seas Products Raytheon Marine High Seas Schulung: Logs Kiel: 09. &...

Raytheon Marine GmbH

High Seas Products

Raytheon Marine High SeasRaytheon Marine High Seas

Schulung: Logs

Kiel: 09. & 16.06.04Thomas Wolter


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.


High Seas ProductsBV

071

2.00

„WALKER“ -Log:


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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


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Speed = distance / time

distance

Time


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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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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.


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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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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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-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


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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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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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


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Raytheon Marine GmbH High Seas Products Raytheon Marine High Seas Schulung: Logs Kiel: 09. &...

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