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100+ Free MCA Master Yacht Stability Practice Questions

Prepare for the MCA Master Yacht — Stability (IAMI Written Examination) exam with instant access — no signup required.

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Key Facts: MCA Master Yacht Stability Exam

2.5 hours

Official Written Exam Duration

GOV.UK Stability Examination Syllabus

Two parts

Official Written Paper Structure

GOV.UK Stability Examination Syllabus

60% overall

Pass Mark (≥40% in each part)

GOV.UK Stability Examination Syllabus

5 days / 30 hours

Formal Course Duration

GOV.UK Stability Examination Syllabus

Confirm with centre

IAMI Exam Fee

MCA-approved training centres / IAMI

MCA / IAMI

Administrator

MSN 1858 yacht deck certification framework

MCQ study adaptation

This Free Practice Bank

OpenExamPrep study aid (not official paper)

Free 100-question English MCQ study bank for the MCA/IAMI Master Yacht Stability written module (MSN 1858 yacht deck pathway). Official exam: 2.5 hours, two parts, 60% overall and ≥40% in each part. Fee: confirm with approved centre. Covers hydrostatics, GM/GZ, free surface, list, loll, dry docking, trim and damage concepts. Not an official paper simulation.

Sample MCA Master Yacht Stability Practice Questions

Try these sample questions to test your MCA Master Yacht Stability exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A box-shaped yacht has length 40 m, breadth 8 m, depth 4 m and displacement 640 tonnes in seawater of relative density 1.025. What is the approximate mean draught?
A.3.2 m
B.2.5 m
C.1.95 m
D.1.5 m
Explanation: Displacement mass = L × B × d × RD. So 640 = 40 × 8 × d × 1.025 → 640 = 328 d → d = 640/328 ≈ 1.95 m. Freeboard would be depth minus this draught.
2For the same box yacht (L 40 m, B 8 m, depth 4 m) floating at 1.95 m draught in seawater RD 1.025, what is the approximate freeboard?
A.1.05 m
B.2.05 m
C.0.55 m
D.4.00 m
Explanation: Freeboard = moulded depth − draught = 4.00 − 1.95 = 2.05 m.
3Displacement of a yacht is 850 tonnes, length 50 m, breadth 9 m, mean draught 2.4 m in seawater RD 1.025. What is the block coefficient Cb?
A.0.90
B.0.65
C.0.55
D.0.77
Explanation: Cb = Δ / (L × B × d × RD) = 850 / (50 × 9 × 2.4 × 1.025) = 850 / 1107 ≈ 0.77.
4What does the block coefficient (Cb) of a yacht describe?
A.The ratio of wetted surface area to length squared
B.The ratio of underwater volume to the volume of a rectangular block of L × B × d
C.The ratio of freeboard to depth
D.The ratio of GM to beam
Explanation: Block coefficient Cb = underwater volume / (L × B × mean draught). It measures how full or fine the underwater form is relative to a rectangular box.
5How does a higher block coefficient generally affect resistance to forward motion at moderate speed?
A.It always reduces resistance because the hull is fuller
B.It tends to increase wave-making and form resistance compared with a finer hull of similar length
C.It only affects rolling period, not resistance
D.It eliminates skin friction entirely
Explanation: A fuller underwater form (higher Cb) typically increases form and wave-making resistance relative to a finer yacht of similar L and speed; skin friction depends more on wetted area.
6Which two main fluid-flow effects create resistance to a yacht’s forward motion through water?
A.Only magnetic variation and deviation
B.Only metacentric height and KM
C.Skin friction and wave-making resistance
D.Only free surface moments and MCTC
Explanation: Resistance to forward motion is largely from viscous skin friction on the wetted surface and energy lost in generating waves (plus form/eddy components). Stability parameters GM/KM do not create propulsive resistance.
7A yacht’s stability book gives a hydrostatic table. At a given displacement the table lists TPC and mean draught. What is the correct use of the table?
A.Ignore tabulated draught and always compute from L×B×d only
B.Enter with displacement (or draught) and read the corresponding hydrostatic values for that condition
C.Use only freeboard tables and discard displacement
D.Hydrostatic tables apply only in dry dock
Explanation: Hydrostatic tables in the stability booklet link displacement and draught (and related properties). Enter with known displacement or draught to obtain the matching mean draught, TPC, KM, MCT etc.
8A box-shaped barge 30 m × 6 m floats at 1.5 m draught in fresh water (RD 1.000). Displacement is 270 t. What is the displacement in seawater of RD 1.025 at the same draught?
A.300 t
B.263 t
C.276.8 t
D.270 t
Explanation: At fixed submerged volume, mass ∝ density. Seawater mass = 270 × 1.025 / 1.000 = 276.75 t ≈ 276.8 t.
9If a yacht moves from seawater into a river of lower density without changing mass, what happens to mean draught?
A.Draught is unchanged because mass is constant
B.Draught becomes equal to freeboard
C.Draught decreases
D.Draught increases
Explanation: Mass = volume × density. Lower density requires greater submerged volume to support the same mass, so mean draught increases (and freeboard falls).
10TPC (tonnes per centimetre immersion) for a waterplane is approximately 1.025 × A_w / 100 in seawater SI units. If waterplane area A_w is 200 m², TPC is about:
A.1.0 t/cm
B.20.5 t/cm
C.2.05 t/cm
D.0.205 t/cm
Explanation: TPC ≈ 1.025 × A_w / 100 = 1.025 × 200 / 100 = 2.05 tonnes per centimetre immersion.

About the MCA Master Yacht Stability Exam

The MCA Master Yacht Stability examination is the IAMI written module that ensures Chief Mate and Master (Yachts) candidates can apply hydrostatics and intact stability principles to large yacht operations. Assessment is a 2.5-hour written paper in two parts with a 60% overall pass mark and at least 40% required in each part. The syllabus covers draught and freeboard, displacement and block coefficient, initial GM and GZ, loading and free surface, list and the inclining experiment, curves of statical stability and large yacht code criteria, angle of loll, dry docking (critical period and P force), and longitudinal stability (trim, LCF, MCTC). This free bank is an English-language multiple-choice study adaptation of that written syllabus — not an official IAMI paper.

Assessment

Official: written examination in 2.5 hours, two parts. Part A — four questions involving calculations and explanation; Part B — one question on curves of statical stability and one on loll, dry docking and longitudinal stability. This practice set converts that assessable knowledge into four-option MCQs for study fluency.

Time Limit

2.5 hours (official written paper); approved course duration five days or 30 hours of formal instruction

Passing Score

60% overall, with a minimum of 40% in each part, as stated in the official GOV.UK Stability Examination Syllabus (do not invent other percentage thresholds)

Exam Fee

Confirm the current IAMI written-examination fee with your MCA-approved training centre before booking (centre and IAMI fees are revised periodically) (Maritime and Coastguard Agency (MCA) / International Association of Maritime Institutions (IAMI))

MCA Master Yacht Stability Exam Content Outline

18%

Hydrostatics & Hull Form

Box-shaped and tabulated hydrostatics: draught, freeboard, displacement from L×B×d×Cb×RD, relative density, block coefficient, and skin-friction / wave-making resistance ideas

20%

Transverse & Initial Stability

G, B, M and Z; righting lever GZ and righting moment; KM from beam and draught; GM stiff/tender; moments about the keel when loading, discharging or shifting weights

20%

List, Inclining & Free Surface

List from off-centre weights; correcting list by move/load/discharge; inclining experiment precautions and GM formula; free surface moments, FSC and virtual GM

18%

GZ Curves & Yacht Code Criteria

Range of positive stability, max GZ, vanishing angle, dynamical stability, initial GM from curve slope; beam, freeboard and KG effects; wind-heeling levers; large yacht code minima including residual stability after free-flooding

16%

Loll, Dry Docking & Longitudinal Stability

Negative GM and angle of loll versus list; correcting loll; critical period, critical moment and P force; FP/AP/LBP, LCF, LCG, LCB, MCTC and change of trim

8%

Grounding & Damage Stability Concepts

Grounding reaction and reduced buoyancy effects; free-flooding of a compartment; residual GZ ideas and one-compartment free-flooding criteria referenced in large yacht codes

How to Pass the MCA Master Yacht Stability Exam

What You Need to Know

  • Passing score: 60% overall, with a minimum of 40% in each part, as stated in the official GOV.UK Stability Examination Syllabus (do not invent other percentage thresholds)
  • Assessment: Official: written examination in 2.5 hours, two parts. Part A — four questions involving calculations and explanation; Part B — one question on curves of statical stability and one on loll, dry docking and longitudinal stability. This practice set converts that assessable knowledge into four-option MCQs for study fluency.
  • Time limit: 2.5 hours (official written paper); approved course duration five days or 30 hours of formal instruction
  • Exam fee: Confirm the current IAMI written-examination fee with your MCA-approved training centre before booking (centre and IAMI fees are revised periodically)

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

MCA Master Yacht Stability Study Tips from Top Performers

1Drill the sign convention for free surface: free surface always reduces virtual GM — never treat FSM as increasing stability
2Practise full KG problems with moments about the keel: final KG = total moments / final displacement, then GM = KM − KG, then apply FSC
3On every GZ curve identify initial GM (slope), max GZ and its angle, range of positive stability, vanishing angle and approximate deck-edge immersion
4Distinguish list (positive GM, G off centreline) from loll (negative initial GM, equilibrium at an angle) — corrections are opposite
5For dry docking, memorise critical period, critical moment and that P force effectively raises G / reduces GM until the yacht is fully landed
6Longitudinal: change of trim (cm) = (w × distance from LCF) / MCTC; new drafts from mean draught and trim distribution about LCF
7Know large yacht code stability ideas: minimum GM, maximum GZ at an adequate angle, residual stability after free-flooding of any one compartment
8Work timed calculation papers under exam conditions — the real paper is written and calculation-heavy, not multiple choice

Frequently Asked Questions

What is the MCA Master Yacht Stability exam?

It is the IAMI written examination on the MCA Master (Yachts) pathway that tests hydrostatics and intact stability knowledge needed to operate large yachts safely. The official GOV.UK syllabus sets a 2.5-hour written paper in two parts after a five-day (30-hour) course of formal instruction.

What is the official pass mark?

The official Stability Examination Syllabus states candidates must achieve an overall pass mark of 60%, and a minimum mark of 40% must be achieved in each part.

How long is the written paper?

The official syllabus allows 2.5 hours for the written examination. The associated course must take place over five days or 30 hours of formal instruction.

Is the real exam multiple choice?

No. The official assessment is a worked written paper (Part A calculations/explanation; Part B GZ curves plus loll, dry docking and longitudinal stability). These free practice items are an English-language multiple-choice study adaptation of the same syllabus topics — not an official IAMI paper simulation.

What topics does the syllabus cover?

Basic hydrostatics and hull form; statical and initial stability; loading, discharging and free surface; list and the inclining experiment; curves of statical stability and yacht stability booklet use; angle of loll; dry docking; and longitudinal stability (trim, LCF, MCTC).

How much does the exam cost?

IAMI written-examination fees are set through MCA-approved centres and change over time. Confirm the current fee with your approved training centre before booking.

Who administers the exam?

Written papers are IAMI examinations for the MCA Master Yacht deck certification pathway under MSN 1858, taken at MCA-approved centres.

Is a course required?

The official syllabus specifies a five-day or 30-hour course of formal instruction for Stability. Confirm current entry and course requirements with MCA and your approved training centre before booking the written sitting.