Gantry rigged survey Rib

How do you hang 100kg of Magnetometer over the side of a Survey Rib?

And why would you?

Renewable energy is driving construction in the waters around the UK at an ever increasing pace.  Studies commissioned by Europe’s major energy companies show that as much as 10 percent of all bombs and torpedoes fired or dropped during the second world war failed to detonate.  The reality is thousands upon thousands of tonnes of unexploded ordnance lie in the waters around the UK, and that’s not just at sea.  UK inland waterways, particularly the River Thames in London, contain an alarming amount of submerged bombs and munitions.

So how do you find them?

Cabin Rib 'Hercules' UXO

Thanks to an over intellegent Carl Friedrich Gauss, the magnetometer was born in 1833.  Magnetometers being widely used to measure the Earth’s magnetic field also make quite good magnetic anomaly detectors (metal detectors to you and me).  Recently CRC supplied Hercules, one of our 9m cabin Ribs to a leading survey company to detect UXOs in London’s West India Docks.  To make it all work, here’s the recipe:

1. 9m Ribcraft Cabin Rib – MCA coded and approved by the Port of London Authority

2. Seriously educated surveyors complete with cutting edge magnetometer system – a.k.a. the Client

3. Clear deck space with integral fixing points and bolt-downs for the survey gantry

4. Pure sine wave 240 volt power generator with a direct fuel feed from the vessel’s tanks (safety first!)

5. State of the art workshop facility to rig and test all of the equipment

6. One friendly, experienced skipper

Not forgetting to add some comfort for the crew – cabin heating, suspension seats, WiFi, etc . . .

What follows is a 2 week, highly successful UXO survey resulting in some complex and interesting discoveries and a very satisfied customer.  

So how does a surveyor hang 100kg of magnetometer over the side of a Rib?

They start by clicking here: