Osaka Nunotani KN-R165 Magnetic Compass Bow
Osaka Nunotani
Refurbished
|
Specification |
Details |
|---|---|
|
Manufacturer |
Osaka Nunotani Seiki Co., Ltd. |
|
Country of Origin |
Japan |
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Product Name |
Magnetic Compass Bowl |
|
Model |
KN-R165 |
|
Product Category |
Marine Magnetic Navigation Compass |
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Approval Marking |
Japan MOT Approval Type No. 1726 |
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Manufacturing Date |
May 2002, according to supplied identification |
|
Weight |
Approximately 11 kg, bowl only, according to supplied information |
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Gimbal Marking |
No. 480A |
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Compass Card |
0–360° graduated directional card |
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Main Construction |
Liquid-filled bowl with glass cover and gimbal mounting |
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Application |
Ship standard or steering magnetic compass |
|
Product Condition |
Used / ship-recovered, as supplied |
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Functional Test Status |
Not confirmed |
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Replacement Availability |
Subject to stock confirmation |
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International Supply |
Worldwide shipping enquiries accepted |
Identification note: The manufacturer's label identifies the KN-R165 magnetic compass bowl and Japan MOT Approval Type No. 1726. The visible No. 480A marking identifies the gimbal assembly. This number should not be confused with the compass model or a complete binnacle part number.
The Osaka Nunotani Seiki KN-R165 Magnetic Compass Bowl is Japanese marine navigation equipment designed for use in a compatible shipboard magnetic compass arrangement.
Magnetic compasses provide directional information by responding to the Earth's magnetic field. Unlike electrical heading instruments, a conventional direct-reading magnetic compass does not require a power supply to establish magnetic heading.
The KN-R165 compass bowl incorporates a graduated floating compass card, glass viewing cover, surrounding degree scale and gimbal mounting arrangement.
The supplied item is a used, ship-recovered compass bowl bearing the manufacturer's identification plate. It may be relevant to vessel owners and technical managers maintaining an existing Nunotani magnetic compass or seeking a compatible replacement during repair or dry-docking.
SM MARINE SERVICE™ supports enquiries for the KN-R165 compass bowl and related marine navigation spare parts. The exact product condition, compatibility and available stock must be confirmed before ordering.
Website: www.smmarineservice.com
The nameplate is particularly important for replacement enquiries because it provides the exact manufacturer and product designation.
For marine purchasing teams, ordering by KN-R165 is more reliable than searching only for a general magnetic compass bowl.
The KN-R165 is the central bowl assembly of a marine magnetic compass. It contains a graduated compass card that responds to magnetic north.
The bowl is mounted within a compatible gimbal and binnacle arrangement. The gimbals allow the assembly to accommodate vessel movement so the compass remains sufficiently level for normal operation.
A complete shipboard installation may also include a binnacle, corrector magnets, lighting arrangements, bearing equipment or optical reading accessories, depending on the compass configuration.
The supplied photographs show the bowl and gimbal-related assembly rather than a complete binnacle installation.
The KN-R165 and related KN-R165A models are documented as part of the Osaka Nunotani Seiki marine compass family. However, KN-R165 and KN-R165A must not be assumed interchangeable without checking the actual mounting, dimensions and equipment documentation.
Japanese manufacturer identification: Osaka Nunotani Seiki Co., Ltd.
Model KN-R165: Provides exact identification for marine spare-parts procurement.
Liquid-filled compass bowl: Supports the floating compass card mechanism.
360-degree compass card: Displays graduated magnetic directional information.
Glass viewing cover: Allows visual reading of compass direction.
Gimbal arrangement: Accommodates normal vessel motion.
Outer graduated ring: Provides angular reference markings on the photographed assembly.
Mechanical magnetic operation: Determines direction without requiring electrical power for the magnetic sensing function.
Approval marking: Japan MOT Approval Type No. 1726 appears on the product label.
The individual bowl's present accuracy, liquid condition and suitability for navigation require inspection and testing.
|
Parameter |
Details |
|---|---|
|
Brand / Manufacturer |
Osaka Nunotani Seiki |
|
Model |
KN-R165 |
|
Equipment Type |
Marine magnetic compass bowl |
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Compass Principle |
Magnetic heading indication |
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Compass Card Graduation |
0–360° |
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Liquid Filling |
Liquid-filled construction |
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Viewing Window |
Glass cover |
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Mounting Arrangement |
Gimbal-supported bowl assembly |
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Approval Identification |
Japan MOT Type No. 1726 |
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Date Marking |
2002-05, according to supplied information |
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Approximate Weight |
11 kg, bowl only; verify before freight quotation |
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Gimbal Identification |
No. 480A |
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Electrical Supply |
Not required for basic magnetic heading indication |
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Exact External Dimensions |
Not independently verified |
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Compass Liquid Specification |
Not verified |
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Compatible Binnacle Models |
Not confirmed |
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Operational Accuracy |
Not tested or confirmed |
Technical note: The model number contains R165, but the exact compass-card diameter and external bowl dimensions have not been independently established for this particular unit. Measurements should be checked before confirming physical compatibility.
The main components of this type of magnetic compass assembly include:
The floating compass card presents directional headings in degrees from 0° to 360°. Its movement must remain free and stable for reliable readings.
The liquid supports the compass card and helps control oscillation. The correct liquid type, filling procedure and sealing components must follow the manufacturer's specifications.
The transparent cover protects the internal compass mechanism and allows the heading to be observed.
The gimbal arrangement supports the bowl and allows movement relative to the binnacle as the ship rolls and pitches.
The photographed gimbal is marked No. 480A.
Internal mechanical components support the card's movement. Their exact configuration and replaceable part numbers have not been verified for this unit.
Depending on the installation, associated equipment may include compass corrector magnets, lighting, mounting hardware and bearing accessories. These components are not confirmed to be included with the photographed item.
The Osaka Nunotani Seiki KN-R165 magnetic compass bowl is relevant to ships equipped with compatible Nunotani compass arrangements.
Typical applications include merchant vessels, bulk carriers, tankers, container ships, tugboats and other marine craft with suitable standard or steering magnetic compass installations.
The magnetic compass provides an important heading reference independently of the ship's electrical power supply.
Under SOLAS Chapter V, Regulation 19, applicable vessels must carry a properly adjusted magnetic compass or equivalent means independent of any power supply. Additional compass-carriage provisions depend on vessel type and tonnage.
The approval marking on the photographed KN-R165 identifies the historical type approval; it does not, by itself, establish the present condition or regulatory acceptance of the used unit.
|
Problem |
Possible Cause |
Recommended Action |
|---|---|---|
|
Air bubble inside bowl |
Liquid loss, temperature effects or seal deterioration |
Have the bowl inspected and serviced by qualified personnel |
|
Compass card sticking |
Internal friction, pivot damage or contamination |
Arrange professional examination |
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Sluggish compass movement |
Deteriorated internal mechanism or unsuitable fluid condition |
Check through an approved service procedure |
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Cloudy compass liquid |
Contamination or ageing |
Evaluate liquid and internal condition |
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Cracked glass |
Impact or mechanical damage |
Replace with suitable approved components |
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Liquid leakage |
Failed gasket, seal or housing damage |
Inspect and repair the sealing arrangement |
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Excessive compass deviation |
Vessel magnetism or installation influences |
Arrange magnetic compass adjustment |
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Bowl does not move freely |
Gimbal obstruction or mounting fault |
Inspect the pivots and mounting assembly |
These are general magnetic compass fault conditions, not evidence that the photographed unit has any of these defects.
Before installation, a qualified technician or compass adjuster should verify that the compass card floats freely, remains readable and moves without sticking. The bowl should be checked for liquid leaks, visible bubbles and glass damage.
The gimbals must move correctly, and the compass must be suitable for the intended binnacle.
Such inspection items are consistent with published marine magnetic compass survey guidance.
A magnetic compass needs periodic inspection and adjustment to maintain reliable heading information.
Recommended maintenance includes checking the bowl for leakage, monitoring liquid condition, inspecting the glass and seals, examining the gimbal mechanism and keeping the viewing surfaces clean.
Compass error and deviation should be checked and recorded in accordance with the vessel's approved navigation procedures.
Following installation or replacement, a competent magnetic compass adjuster should assess the system and establish the required deviation information.
Professional readjustment is particularly relevant after compass replacement, vessel structural modification or changes to nearby magnetic and electrical equipment.
Do not refill an unknown compass liquid or dismantle the bowl using unverified procedures.
SM MARINE SERVICE™ supports sourcing enquiries for the Osaka Nunotani Seiki KN-R165 Magnetic Compass Bowl and related marine navigation equipment.
Potential requirements include:
Complete KN-R165 compass bowl.
Suitable replacement magnetic compass bowl.
Compatible gimbal and mounting components.
Compass glass and sealing components, where available.
Identified internal mechanical parts.
Compatible complete magnetic compass or binnacle assemblies.
The supplied product is described as used and ship-recovered. Current liquid condition, freedom of card movement, leakage status, professional adjustment and test results have not been confirmed.
Depending on availability, SM MARINE SERVICE™ can assist with enquiries for used, refurbished, reconditioned or other suitable replacement equipment.
Buyers should provide the exact model KN-R165, a nameplate photograph, the existing binnacle model, relevant mounting dimensions and whether a bowl-only replacement or complete binnacle assembly is required.
For a used unit, request confirmation of the liquid condition, glass condition, gimbal movement and inspection status.
A replacement should not be accepted as operationally suitable until compatibility, condition and required compass adjustment have been established.
For quotations and worldwide sourcing enquiries, visit www.smmarineservice.com.
Despite the widespread use of gyrocompasses, satellite navigation and integrated bridge systems, the conventional magnetic compass remains valuable because its basic heading indication does not depend on external electrical power.
It can provide an independent navigational reference when powered heading systems become unavailable.
Ships fitted with older Nunotani compass systems may continue to require compatible replacement bowls so that the existing approved installation can be maintained.
Correct adjustment, readable markings and reliable mechanical operation remain essential regardless of the compass's age.
It is a Japanese marine magnetic compass bowl used within a compatible shipboard magnetic compass installation.
The manufacturer's nameplate identifies Osaka Nunotani Seiki Co., Ltd., Japan.
It is the approval-type identification marked on the supplied compass bowl. Current acceptance of a used unit must be verified separately.
Its basic magnetic heading indication does not require electrical power. An associated binnacle may have electrical lighting or other accessories.
No. Suitability depends on the approved compass installation, binnacle compatibility, dimensions, condition and vessel requirements.
Interchangeability has not been confirmed. Compare the exact technical and mounting specifications before replacing one with the other.
Possible causes include liquid loss, seal deterioration or temperature-related effects. The bowl should be professionally inspected.
Possible causes include pivot wear, internal contamination or mechanical damage. A qualified technician should investigate.
No complete functional or adjustment test has been confirmed from the supplied information.
SM MARINE SERVICE™ accepts enquiries for the KN-R165 and related marine compass components, subject to stock and sourcing availability.
Yes, international equipment sourcing and worldwide shipping enquiries are welcome, subject to availability and shipping arrangements.
The Osaka Nunotani Seiki KN-R165 Magnetic Compass Bowl is Japanese marine navigation equipment designed for compatible shipboard standard or steering magnetic compass installations. The supplied unit features a liquid-filled bowl, 360-degree compass card, glass viewing cover and gimbal mounting arrangement marked No. 480A. Its identification plate carries Japan MOT Approval Type No. 1726 and manufacturing information supplied as May 2002.
SM MARINE SERVICE™ supports international enquiries for used KN-R165 magnetic compass bowls, compatible replacement equipment and marine navigation spare parts. Product condition, dimensions, binnacle compatibility and functional suitability should be confirmed before ordering.
Marine Automation & Navigation Equipment Supplier
Available Equipment Conditions:
New Equipment • Used Equipment • Refurbished Equipment • Reconditioned Equipment
Specific product condition and availability are subject to confirmation.
Stock Locations:
Bangladesh • China
Services:
Worldwide Shipping • Technical Support • Spare Parts Supply • Marine Equipment Sourcing
Contact Information
SM MARINE SERVICE™
Samir Market, DT Road, Pahartali, beside CDA Market, Chattogram, Bangladesh
Mobile / WhatsApp / Viber: +88 01818 929292
Email: info@smmarineservice.com
Website: www.smmarineservice.com
For enquiries regarding the KN-R165 compass bowl, marine magnetic compass replacement units and other navigation spare parts, contact SM MARINE SERVICE™ with the equipment model, photographs and shipping destination to request a quotation.
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