Two Beers, Four Hours and a Long Night
It is 11:30 pm on a Friday. Tom has been at a friend's barbecue since 6 pm and has had four full-strength beers between 6:30 and 9:00 pm, plus a large meal. He has not slept well for two nights and has been awake since 5:30 am. He decides to take his PWC out for a night run on the harbour because the water is calm and he wants to test new underwater lights. He has a PWC licence and his registration is current. He rides for 40 minutes, then stops at a floating pontoon where a maritime officer is conducting random checks. Tom feels 'fine' and is confident he is under the limit because his last drink was two and a half hours ago. He is asked to undergo breath testing and becomes argumentative, saying he has a right to refuse because he is not driving a car.
1. Assess Tom's fitness to be operating a PWC at 11:30 pm, considering alcohol, fatigue, and the time of day.
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Alcohol. Four full-strength beers over two and a half hours, finishing two and a half hours before the check, does not guarantee he is under the limit. Elimination is roughly one standard drink per hour for a typical adult, but it varies with body mass, liver function, food and individual factors, and the margin is not something a rider can self-assess. 'Feeling fine' is not evidence - tolerance masks impairment while reaction time and judgement are still degraded.
Fatigue. This is the underrated factor. Tom has been awake since 5:30 am and has slept poorly for two nights. He is operating at 23:30, in the dark, after a long day and a meal and alcohol. Fatigue impairs reaction time, vigilance and decision-making in ways that compound alcohol impairment. The combination is worse than the sum of the parts.
Night operation. Darkness reduces the visual cues a PWC rider relies on for distance, closing speed and obstacles. Underwater lights are not navigation lights and do not make him visible to others.
Conclusion. Even if a breath test came back under the limit, Tom's decision to ride was poor. The exam point is that fitness to ride is a judgement about alcohol, fatigue, medication, illness and conditions together - not a single number. The correct decision was made at the barbecue, not at the pontoon.
2. Tom says he can refuse the breath test because he is not driving a car. Is he right, and what are the consequences of his attitude?
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He is wrong. Breath and drug testing powers apply to people operating vessels, including PWCs, not just motor vehicles. A PWC is a vessel, and the person in command of it is subject to the same testing regime as a car driver. Refusing or failing to comply with a lawful direction to undergo testing is itself an offence, and it is treated seriously - a refusal is generally dealt with as if it were a high-range result.
Consequences. Refusing does not avoid the problem; it usually makes it worse. It can lead to a charge, loss of licence, and significant penalties. Being argumentative at the check also creates a record of demeanour that will not help him.
What he should have done. Complied with the direction, been cooperative, and if he believed the check was unlawful, raised it later through the proper process rather than at the pontoon.
The exam judgement. Scenarios like this test whether you understand that water and road regimes run in parallel on alcohol and drugs. The trap is the 'it's not a car' reasoning, which is exactly the reasoning the question is designed to catch. The safe answer is: the same obligations apply, comply, and the decision not to ride should have been made before he left home.