GCSE Seismic Science Today Seismic Tomography AIRGUNS January 24, 2016teacheratseamarEdit Airguns – compressed air in a sealed tube that is suddenly released causing an explosive expansion. The airgun arrays on the aft deck of the ship were impressive. Airgun arrays prior to being deployed. … Continue reading GCSE Geology Content
Maths at sea: Short teacher rant here – Please don’t tell your children that you were rubbish at maths, can’t do maths, found maths boring, that maths is really hard. This makes a teacher’s work really difficult. The child believes it is OK to give up, they too just can’t do it, at the end… Continue reading Maths on board.
Rubbish and Recycling This is ONE weeks rubbish from 51 people on the RRS James Cook Incinerator for burning rubbish. Aerosols MUST NOT go in the incinerator. This would be very dangerous as they would explode in the heat. Fire is a big fear on a ship. So aerosols are kept very separate. Batteries also… Continue reading Rubbish, recycling, RRS JC….
Mapping of the ocean floor is called bathymetry. The figures are usually in minus number with zero being the sea surface. The larger the number the deeper the ocean floor. There are many ways to collect data about the depth of ocean floor. Satellites, gravity, echo sounders, seismics are probably the most obvious. As ships travel… Continue reading Autosub data (plus Nigel picture)
The RRS James Cook has four engines; each engine has a capacity of 2000hp or 1728kw only two or three engines are used at once. The fuel consumption is monitored daily. The engine ‘mission control’ room has knobs not levers to turn. The switchboard room with 1000 amp circuit breakers has a futuristic… Continue reading Engine Room and Nigel
Today we deployed the big yellow streamer for the first time. This will record data at a higher frequency than the OBS. The survey is more concentrated in some places for the streamer. Above: Tim and Stefan beside the tail buoy. The four pictures below show the tail buoy being deployed. The next four pictures show:… Continue reading Deployment of the streamer
Gael (unknown to me) took a photo of Professor Tim Reston explaining 2nd year degree level seismic surveys (in other words seismic surveys for beginners) to me. I thought my own students would find it amusing to see me concentrating to try to understand a concept – I need to brush up on my maths… Continue reading Why Does a Ship Float?