Posts Tagged ‘RYA Training’

This little blog is simply to act as a reminder for symbols you may commonly see on weather charts. As we know weather forecasting is not an exact science but a science it is, the information given below is a very simple summary of the common symbols used with the typical weather associated.

warm front

Warm Front – This symbol depicts the leading edge of a warmer air mass. The air ahead of this front will be cooler than the air behind it. Typical weather ahead of the warm front will be fine then heavier rain, as the warm front passes the rain will stop and become drizzle in the warm sector.


Cold Front

Cold Front – This symbol depicts the leading edge of a colder air mass. The air ahead of this front will be warmer than the air behind it. Typical weather just before and at the front itself will be heavy rain, hail, thunder, lightning, behind the front there will be sunny periods with scattered showers.


Occluded FrontOccluded Front – An occluded front is formed when the cold front catches up the warm front, the symbol combines the shapes of the warm and the cold front. Typically underneath an occluded front there will be rain as the warm air is being pushed aloft and condenses.


Frontal System Northern Hemisphere

Frontal System – This diagram shows a frontal system and the relationship between the fronts described above. This is a typical frontal system in the Northern Hemisphere and can be seen on good quality weather forecasts on television. The system is formed around an area of low pressure which will circulate in an anti-clockwise direction. This example already shows an occluded front where the cold front has already caught up with the warm front, the cold air in front of the warm front and behind the cold front with the area of warm air being squeezed in between.


Stationary FrontStationary Front – A stationary front is a boundary between two air masses neither of which is strong enough to replace the other. Cloud and rain are usually associated with a stationary front.


Developing Warm FrontDeveloping Cold Front Developing Warm / Cold Front (Frontogenesis) – This symbol depicts the formation or intensification of a meteorological front caused by the difference in temperature of adjacent air masses. No significant weather associated.


Weakening Warm FrontWeakening Cold Front Weakening Warm / Cold Front (Frontolysis) – This symbol represents a front which is loosing its identity usually due to rising pressure and where air masses are diverging. Cloud and precipitation becomes increasingly fragmented.


High and Low Pressure Isobars

High & Low Pressure Systems – This diagram depicts pressure systems in the Northern hemisphere, the arrows are showing us the wind direction, the wind moves anti-clockwise around an area of low pressure and clockwise around an area of high pressure. You will also note that the arrows around the low pressure are pointing slightly inwards toward the centre this is due to the wind converging around an area of low pressure, the opposite is true of high pressure, the wind diverges and therefore points slightly away from the centre.


Geostrophic wind scale

Surface Pressure Chart – This surface pressure charts shows areas of high and low pressure depicted by the H and the L on the chart. You can also see lines all over the chart which are called isobars, these connect areas of the same pressure, some of these lines have numbers on them which is giving you the pressure at that particular isobar. Isobars are like contour lines on an ordnance survey map, the closer they are together the steeper the hill, with isobars the closer they are together the stronger the wind. With this type of chart you can actually measure the wind speed by measuring the space between the isobars and using the scale in the top left hand corner.


Wind Strength symbols

Wind symbols – If you use grib files or sites like Passage Weather you will see lines such as the ones on the left here showing you the wind direction and the wind speed in the area you are looking at. Wind is always described in relation to the direction it is coming from, in the UK our prevailing wind and weather comes from the South West and in wind terms would be described as a South Westerly. On the bars on the left there are a number of different lines or barbs, the short lines represent 5 knots and the long lines 10 knots of wind. You can now see combinations of these making up 15, 20, 25 etc until you reach the triangular shape which represents 50 knots. These lines will always be on the back of the arrow and this is where the wind is coming from so in all the examples on the diagram the wind is coming from the north east.


If you found this blog useful please let us know and if there are any specific topics you would like us to cover in future blogs, again please let us know, you can contact us directly at info@nomadsailing.co.uk

So you have decided you are going to take an RYA sail training course and now the fun starts, who will you chose to deliver the course ? There are so many schools out there and they should all be the same in the following areas;

  • All use RYA qualified instructors
  • All follow the same RYA syllabus
  • All will be using coded boats with the full array of safety equipment, boats and procedures which are regularly inspected by the RYA

So how do you chose ? You may want to train on a particular type of boat, you may need to be in a specific area, you may have a limited set of dates in which to do the course, all of these aspects will help you narrow down your choice then there is the question of price, do you go for the cheapest ? A word of warning here, not all schools offer all inclusive courses, check the small print, the initial price may well be lower but when you are then asked everyday to contribute towards mooring fees, food on board and buy your evening meal every night you will find the overall price for the course a great deal more than the initial advertised amount, do you also have to pay for wet weather gear on a daily basis if you need to use it ?

One small mention of creature comforts, pillows, I appreciate this sounds trivial, you will be sleeping on board for at least 4 nights, do you sleep without a pillow at home ? Is a pillow provided for you on board ?

What about the instructor ? You will expect a good communicator, one who is able to empathise with you, explain tasks in an easily understandable fashion and give positive feedback for improvement. At times there is a need to project your voice on a boat to be heard from bow to stern there is however never any need to shout in anger. I have heard some horror stories unfortunately and been personally subjected to “my 9 year old son can do this better than you” which hardly instils confidence the day before the examiner gets on board.

So how can you find out about instructors ? Ask around, recommendation is one of the best ways to find a school that will suit you, most schools have websites with testimonials but we only post the good ones don’t we ? Trytripad anyone can write what they like with and whilst I am pretty sure we were the first sailing school to put ourselves on tripadvisor I am happy to say many have followed suit. Linked in another possible forum for finding the right school for you.

Guarantees  Does the school have any guarantees, we introduced a guarantee a number of years ago and found that a number of schools copied the principle of this guarantee however read the small print, some schools only guarantee certain courses or give you a finite number of re-attendance chances. So how does this work, well I will just explain ours and you will have to research other schools. Our guarantee says that if you pay for a course with us and have the necessary prerequisites for the course and if you do not meet the standard during the course you can come back at no additional cost to yourself until such time you do pass the course. Why did we introduce this ? Well we have a great deal of confidence in our ability to teach as we were both teachers before we got into this industry and we know what it is to do exams or assessed courses as you get older, you get out of the habit and you get more nervous, this takes the pressure off.

And finally your course should be safe, it should be informative and it should be fun, if it’s not fun what is the point in doing it ?

We recently delivered the Day Skipper course to Francesca Wickers of the Daily Mail.  To see her take on it ,  have a look at the article she wrote here