COLREG Rule 5 Explained: Look-out Requirements for MCA Oral Exam

Rule 5 of the COLREGs - Look-out - is one of the most fundamental and frequently examined rules in the MCA oral exam. Understanding and properly applying this rule is critical for safe navigation and exam success.

What Does Rule 5 Say?

Rule 5 - Look-out: "Every vessel shall at all times maintain a proper look-out by sight and hearing as well as by all available means appropriate in the prevailing circumstances and conditions so as to make a full appraisal of the situation and of the risk of collision."

Breaking Down the Rule

"At all times"

This means continuously - 24/7, regardless of visibility, traffic density, or time of day. There is no exception. Even in clear weather with no traffic visible, you must maintain a look-out.

"Proper look-out"

What constitutes "proper" depends on circumstances. Consider:

• Vessel size and type
• Traffic density
• Visibility conditions
• Weather and sea state
• Proximity to navigational hazards
• Bridge workload

"By sight and hearing"

Both senses must be used. This is why:

• Bridge doors should be open when safe
• Radio volume should allow hearing external sounds
• Noise levels on bridge should be minimized
• Lookouts posted in restricted visibility

"All available means"

Use every tool at your disposal:

• Visual: Eyes, binoculars
• Electronic: Radar, ARPA, AIS, ECDIS
• Auditory: Sound signals, VHF communications
• Other: Lookout personnel, pilot input

Common MCA Oral Exam Questions on Rule 5

Q: What constitutes a proper look-out?
A: Continuous observation by sight and hearing using all available means (radar, AIS, binoculars, lookout personnel) appropriate to circumstances to fully appraise situation and collision risk.

Q: When should you post a dedicated lookout?
A: Restricted visibility, high traffic density, navigating in confined waters, heavy workload on OOW, during critical maneuvers, or when master/standing orders require it.

Q: Can the OOW be the only lookout?
A: Yes, in daylight with clear weather, low traffic, and no additional workload. But must be able to maintain proper lookout while performing all OOW duties. If not, need assistance.

Q: What are common lookout mistakes?
A: Relying only on radar/AIS, not using hearing, lookout not properly trained, OOW doing paperwork instead of observing, not using binoculars, poor bridge discipline.

Practical Application

In Clear Weather

• Visual scan of horizon and all sectors
• Use binoculars systematically
• Monitor radar for comparison
• Listen for sound signals
• Cross-check with AIS targets

In Restricted Visibility

• Post dedicated lookout on bridge wing
• Master called to bridge
• Engines on standby
• Use radar systematically (ARPA)
• Monitor VHF Channel 16
• Sound appropriate fog signals
• Reduce speed to safe speed

Key Points for Exam Success

• Emphasize "at all times" - no exceptions
• Mention both sight AND hearing
• List available means (radar, AIS, binoculars, lookout)
• Explain factors affecting what's "proper"
• Give practical examples of when to post extra lookout
• Link to Rule 7 (risk of collision) and Rule 19 (restricted visibility)

Related Rules

• Rule 6: Safe speed - lookout informs speed decision
• Rule 7: Risk of collision - lookout provides information
• Rule 19: Restricted visibility - enhanced lookout required
• STCW: Watchkeeping requirements for lookout