Getting up for work at 11.30p.m, I’m happy, because I know this is the last shift of the trip. At midnight I join my colleagues on the gun deck and help the mechanics with recovery of the starboard side seismic guns. For me this is mainly a business of pulling in towing strops, and fixing the hook of a “concertina winch” in certain places on the gun array to bunch the array up or “concertina” it. The gun deck of this old vessel is too short to fit the seven gun array when spread out to its full length.

By 12.30a.m the booms are raised, the big Norwegian buoys are stowed out of the way, and the towing strops have been tightened to pull the slack loops out of the sea to avoid them being caught in our propellor. Shortly, we will recover the seismic cable, and for that, the vessel must be driven backwards.

In a flat calm the single short cable is recovered swiftly. Mostly just a matter of pushing and shoving to keep it neat on the winch drum, which is driven hydraulically. Newer seismic vessels have fairleads and winches which can be used as ways to mechanise this pushing and shoving, but not the Seismariner. What can take hours of potentially hazardous and unpleasant grafting in cold and wind of the North Sea, is forty minutes of tedious work in a flat calm in the overbearing heat of equatorial Africa.

Cable recovered, the ship starts to steam towards Mayumba in the Congo, where we will off sub-contract navigation radio receivers by ship’s boat. (This was a couple of years before differential GPS navigation equipment became commercially available). We all adjourn to the crew mess for a well-earned pot of tea. An hour later, work restarts, and I join the mechanic Eric down in his domain in the guts of the ship. Starting at 3.a.m, I help him strip down and replace the big end bearings in four huge water pumps – 12 bearings in all. It takes three and a half hours and two pots of tea to finish the job.

By now it’s 6.30a.m and it is pouring with rain. This is quite usual at this time of year in this part of the world. Our FRB (Fast Rescue Boat) is made ready to transfer the navigation equipment. The sub-contractors gear – receivers, cables, antennas etc – is made ready on the foredeck. The rain stops, but oppressive clouds remain. The jungle close by is steaming and looks threatening. A short break for what we call “breakfast” (though working nights, it is the main meal of the day), and then the crew is ready. It is an assistant observer (myself), the mechanic (the late Eric Gray), and the Assistant Party Chief (Mick).

We lower the boat, and Eric takes her round to the boarding ladder. I climb in along with our client’s representative, the Texan Dave, and we’re off. The ship grows smaller in the distance as we move inshore. We can discern – with eyes, ears and nose – more detail of the jungle and the beach ahead. As the seabed slopes up to the shore, a huge swell develops, white rollers crashing onto a sandbar. We search without success for a way into the lagoon beyond, passing as we do so, the wreck of a coaster bigger than Seismariner. Her rusted bridge is all that remains above the sand and water. We know that getting into the lagoon will be easy – but getting the boat out again through the immense surf will be impossible.

It’s exciting stuff for a young man: the small boat, the sea, the strangeness of the African jungle close by. We can see people waiting for us ashore, but defeated for the present, we head back to the mother ship. On the way the outboard engine stops, and Eric toils to fix it in heavy, pregnant silence, except for the slopping of wavelets against the gunwhale. The four of us in the boat breath a sigh of relief when the engine whizzes into life; we make it safely back home, and are lifted out of the water.

A while later, a second attempt is made at a slightly different location, and all the equipment and the client rep. are safely dropped ashore. It takes three separate trips to move everything, but all is complete by 10.30a.m. The FRB is recovered once again, and we leave the bay at once, steaming for Pont Noire in the Congo, some ten hours journey away at 12 knots.

After another brief tea break, I spend the final 45 minutes of my shift conducting electrical tests on cabling removed from the gun arrays. My results recorded on a scrap of paper, it’s time once again for “Swarfega” at the close of my 63rd consecutive twelve hour shift – and the last one.

My journey home was instructive. I had no ticket for the last part of the journey (from Paris to my home) and more cash to cover this was offered. I was counselled by my colleagues to refuse this offer as the actual ticket would cost more than the cash being offered by the company administrator. Several of us were taken to the airport and flew in an antique 737 with Lina Congo, to Brazzaville. They did not even pressurize the 737 and it flew at 6000′ the whole way. As it was only the 4th or 5th time in my life I had been in an aircraft at all, this passed me by. Those who knew better were petrified. At Brazzaville we changed onto a 747-combi (half passenger, half freight) of UTA. This was in fact the first long-haul flight I ever took. The flight was to Paris via Doula in Cameroon, and Marseille. All was well until we landed at Marseille at 6a.m the next day, and that’s where we stayed. Owing to fog in Paris, we remained on the tarmac at Marseille for four hours, with neither refreshments nor breakfast served. We eventually arrived at De Gaulle early afternoon. It was February in Paris – foggy.

I spent the rest of the day trying without success to get a flight to England – anywhere – Heathrow, Birmingham, East Midlands. Late in the evening I gave up and took train into central Paris, and secured myself a train ticket to London via the Bologne-Dover ferry. This was 1989 – LONG before the Channel Tunnel. I remember several things about that journey. One of them, is buying a Croque Monsieur from a vendor near Gare St Lazaire, and the second, is sitting in a compartment on the train (that dates this story – compartments??) with a number of men – clearly pilots and aircrew – who claimed to be from Mauritius but who were clearly Scythe Ifrican. This was in the days of apartheid when everything and anyone remotely white South African was considered rather bad form in liberal society. These gentlemen, it must be said, were perfectly upright and pleasant fellows.

We took train from Gare St Lazaire (the first and only time I’ve ever been to that particular station in Paris), crossed the channel, and then on a cold winter’s morning, more trains, from Dover to Victoria and on home. I arrived home on 3rd February 1989, having left on 27th November the previous year. A good trip.