Lesson 1
Wind direction and wind force
Where the wind comes from, the Beaufort scale with its eleven descriptions for thirteen forces, km/h and knots, storm and gusts, and what a wind force means for your boat.
9 steps · 6 questionsKVB1 complete
Klein Vaarbewijs 1 (small craft licence 1) · Chapter 7
Weather, wind and poor visibility
Reading the wind and the weather forecast, understanding high and low pressure, and what you do when fog comes in.
7 lessons42 questions
About this chapter
Before you go out on the water, you check the weather forecast; that is part of preparing your trip. The forecast for shipping mentions, among other things, the wind direction, the wind force, gusts, the visibility and where high and low pressure lie. High and low pressure tell you how the wind blows. And in poor visibility there are separate rules.
In lesson 1 you learn where the wind comes from and how the Beaufort scale works, with the description of each wind force. After that come the weather forecast and the warnings, high and low pressure, backing and veering with the barometer, fog and restricted visibility, and what you do and hear when visibility is poor.
Lessons
Get your licence with KVB1 complete.
With KVB1 complete you open every lesson and test.
Continue with lesson 1 · €10- Lesson 2
The weather forecast for the skipper
Where to find the weather, reading a line from the forecast, the wind warning from force 6, the KNMI colour codes and weather alarm, and what you do before you set off.
8 steps · 6 questionsKVB1 complete - Lesson 3
High and low pressure
Air pressure and isobars, why the wind blows from high to low and bends, Buys Ballot's law, what the distance between isobars tells you and what weather to expect under high and low.
10 steps · 6 questionsKVB1 complete - Lesson 4
Backing, veering and the barometer
What backing and veering mean, a memory aid, why the way counts in a big turn, what a falling or very fast-rising barometer tells you and how the wind usually turns when low pressure approaches.
8 steps · 6 questionsKVB1 complete - Lesson 5
Fog and restricted visibility
What fog is, what else limits visibility, visibility in the forecast, that the BPR give no distance for poor visibility and what Rijkswaterstaat and the police keep to, lights in daytime, and seeing and hearing at the helm.
9 steps · 6 questionsKVB1 complete - Lesson 6
Sailing in poor visibility
When the rules for poor visibility apply, the radar requirement on the waterways of annex 9, what sailing on radar takes, speed and starboard, when you lie still, and what Rijkswaterstaat and the ministry write on top of that.
10 steps · 6 questionsKVB1 complete - Lesson 7
Signals and VHF in fog
Long blast and bell strokes, the fog signal a small vessel may but need not give, what you do when you notice a vessel without VHF contact, listening out and answering, and lying still at a dangerous place.
10 steps · 6 questionsKVB1 complete
Test
Chapter test
14 questions from all seven lessons. You answer everything first and then see your result, with an explanation for each question.