Originally Posted by SDGANDER View Post
But if you are using a radar gun you will surely get SOG unless you are moving at the same speed as the tidal flow?
Presumably thats why PHC don't use radar guns:
How do we measure speed?
The speed limit is "through the water". This is measured by a conventional speed log, usually driven by a small impellor. It needs to be checked regularly for accuracy. Speed "over the ground" is measured very accurately by GPS, and many recreational craft are fitted with this facility. If there are no tidal or weather conditions, your speed "over the ground" and "through the water" will be the same. Remember therefore, if you are measuring your speed by GPS to make allowance for the tidal stream to give you your speed "through the water". Our launches are fitted with both conventional logs and GPS so that we can measure both.
We will normally measure your speed by following at a set distance over several hundred yards - our equipment is checked and adjusted on a daily basis. We can also check speed accurately on radar within the harbour and CCTV is also very useful in the initial detection of speeding craft.
* The speed limit helps to reduce the risk of an incident - please abide by it.
* Please also watch your wash. Keep a good lookout and try not to inconvenience other users.
* Have a "gentle" passage down harbour! Savour the beauty and save your speed till you get into clear water outside.
Don't know anything about PHC but others certainly do - including Chichester if I remember correctly.
'Checked daily' means nothing in court, every 'instrument' we used in evidence had to have a current independent calibration certificate, a copy of which would always be submitted in the disclosure of evidence. Devices/instruments that were not part of the ship's navigation or fixed 'evidence gathering devices' would be immediately removed from use and bagged/tagged as evidence in order that a defence could not say they had been altered. Likewise any electronic evidence was burned to cd and screen shots printed and again tagged as evidence.
As codprawn said say nothing, you maybe interviewed and asked to provide a statement - you do NOT have to do that at the time, I would however suggest you provide name, address and DOB - the onus is on them to provide the evidence to convict you. I would think that harbour masters and their staff have no powers to detain you - but don't quote me on that one!
A good lawyer WILL have a case thrown out before it ever gets to court if there is any doubt about the validity or inaccuracy of the evidence.
As for what 'punishments' the HM can doll out is presumably covered in their bylaws. Likewise places like Portsmouth may incur much more severe penalties!
That said if the HM are following you in their boat and you don't see them maybe you should be keeping a better look out?!
NB. I am not advocating anyone breaking the law in anyway whatsoever!