MARB051 — Apply elements of magnetic compass adjusting

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What an assessment for MARB051 must cover

46 assessable components: 5 elements (17 performance criteria), 13 performance evidence and 16 knowledge evidence requirements. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Prepare for work

1.1Job requirements are identified from specifications and information provided by the ship’s Master or nominated representative
1.2Ship is embarked safely in accordance with International Convention for the Safety of Life at Sea (SOLAS) and Marine Order requirements
1.3Appropriate personal protective equipment (PPE) is selected in accordance with ship work health and safety (WHS)/occupational health and safety (OHS) requirements
1.4Ship is confirmed as being in its ‘normal seagoing condition’ in accordance with standard operating procedures
1.5Movable magnetic materials in the locality of the compass are removed or secured in accordance with workplace procedures
1.6Magnetic equipment is secured in its ‘normal seagoing position’ before beginning adjustments in accordance with workplace procedures

2 Inspect compass

2.1Physical inspection of the compass and binnacle is conducted to determine suitability of compass and binnacle to carry out an adjustment satisfactorily in accordance with manufacturer’s specifications and workplace procedures
2.2Appropriate tools, equipment and techniques are used to inspect compass in accordance with job requirements
2.3Inventory of any correctors already fitted is recorded in ships Safety Management System (SMS) records and/or compass deviation book in accordance with workplace procedures

3 Analyse records

3.1Ship’s compass deviation book and/or records are examined to determine if any changes have been made to correctors since the last compass adjustment in accordance with workplace procedures
3.2Ship’s compass deviation book and/or records are examined to determine recent performance of the compass in accordance with workplace procedures

4 Determine deviations and adjust magnetic compass

4.1Compass deviation errors are determined using procedures outlined in the tentative method of adjustment and the analysis method of adjustment
4.2Compass is adjusted using procedures outlined in the tentative method of adjustment and the analysis method of adjustment
4.3Final swing is performed, and residual deviations are recorded in accordance with tentative method of adjustment and the analysis method of adjustment

5 Complete documentation

5.1A table or curve of deviation from observations taken on principle cardinal and intercardinal headings is produced and the position of correctors and residual coefficients is recorded in accordance with workplace procedures
5.2Outcome of the compass adjustment is confirmed with the Master in accordance with job requirements
5.3Ship is disembarked safely in accordance with SOLAS and Marine Order requirements

Performance evidence

adjusting a magnetic compass onboard a variety of commercial vessels less than or equal to 45 metres on at least eight (8) separate occasions and must include: - two (2) swings in a simulated environment, and - six (6) swings onboard commercial vessels and must include: • two (2) swings on a compass card of a diameter 75 millimetres • two (2) swings on a compass card of a diameter 100 millimetres • two (2) swings on a compass card of a diameter 125 millimetres or over Or: - eight (8) swings onboard a variety of commercial vessels: • two (2) swings on a compass card of a diameter 75 millimetres • two (2) swings on a compass card of a diameter 100 millimetres • two (2) swings on a compass card of a diameter 125 millimetres or over
adjusting deviations from coefficients
analysing the ship’s compass deviation book and records to determine causes of irregular deviations and determining measures for their removal
ascertaining the magnetic bearing of a distant object and/or magnetic heading to determine compass deviation
assessing the safe distances of electronic equipment in the vicinity of the compass
checking accuracy of instruments used in connection with compasses
communicating with the Master to ensure ship is swung appropriately and when required in accordance with compass adjustment requirements
determining deviations due to coefficients A, B, C D and E as appropriate
taking a bearing, using and testing a pelorus and an azimuth mirror
using methods of swinging a ship to obtain a table of deviations
using the analysis method of adjustment and the tentative method of adjustment to adjust a magnetic compass
using the appropriate equipment, methods and basic calculations for finding and compensating compass deviations
using vertical force instrument (VFI) correctly and accurately

Knowledge evidence

analysis method of adjustment and the tentative method of adjustment, including: - process to be followed when adjusting a compass using the analysis method of adjustment and the tentative method of adjustment - rationale for using the analysis method of adjustment, including: • following collision, grounding, stranding, fire of appreciable size, or struck by lightening • following large structural changes to the hull or the superstructure • when a ship is new • when the ship resumes service after having been laid up for a considerable time - rationale for using the tentative method of adjustment, including: • after changing any correctors during the voyage • after the carriage of cargoes of a magnetic nature and/or loaded/unloaded by electro-magnetic cranes • when a ship is at the magnetic equator, to observe deviations and correct permanent coefficient B • when a ship is operating in an area remote from the last place of swinging • when readjustment to the full compensation is done
basic calculations which can be used when adjusting a compass
basic method of detecting mechanical errors in a liquid magnetic compass
basic methods for finding and compensating for deviations due to coefficients A, B, C, D and E
basic methods used for taking a bearing, using and testing a pelorus and azimuth mirror for any error
bearings and headings, including: - compass heading - magnetic bearing of a distant object - magnetic heading - principle headings (cardinal and intercardinal) - true bearings
how to produce a curve or table of deviation from observations on the principle headings
movable magnetic materials, including process for securing or removing materials
planning for a compass adjustment, including: - job requirements and specifications - personal protective equipment (PPE) - time allowed to complete compass adjustment
process for: - determining that a ship is in its ‘normal seagoing’ condition - physically inspecting a compass and binnacle - securing magnetic equipment in ‘normal seagoing’ conditions - swinging a ship
rules to be followed when placing correctors
safe distances of electronic equipment to the compass
ship’s compass deviation book and records, including: - how a compass deviation book can be used to identify causes of irregular magnetic compass deviation - how compass deviation book is used to record outcome of the magnetic compass adjustment
tools and equipment used to inspect and adjust a compass, including: - permanent and soft iron correctors - VFI - transmitting magnetic compass bowls and repeaters
various coefficients resulting from vessel magnetism, including: - A, B, C, D, E, F, G, H K and J - basic calculations for coefficient A, B, C, D and E to determine deviation on any particular heading - limitations and practicalities of adjusting a compass using A, B, C, D and E coefficients
work health and safety (WHS)/occupational health and safety (OHS) workplace procedures, including: - embarking and disembarking from a ship safely - manufacturer’s specifications - Marine Order and International Convention for the Safety of Life as Sea (SOLAS), including requirements of a safely rigged pilot ladder - PPE requirements

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing MARB051

What does an assessment tool for MARB051 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MARB051 needs to address all 46 unit components: 5 elements with 17 performance criteria, 13 performance evidence requirements, 16 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for MARB051?

Auditori pulls the current release of MARB051 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for MARB051 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing MARB051 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of MARB051, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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