- Signed on — Formally joined the ship's crew
- A merchant seaman signed Ship's Articles: a legal agreement to serve for a voyage or a fixed term. Until he signed off he was, in law, part of the ship.
- Signed off — Left the ship's crew, and was paid
- Wages were settled at the end of Articles — hence 'paid off'. Only then could a man go home.
- Joined — Travelled to the ship and went aboard
- Often a long journey in itself. David joined the Naess Spirit at Marseilles and the Naess Endeavour at New York, flying out to meet ships that never came home.
- L.E.F.O. — Land's End for orders
- A ship would sail from the loading port without knowing her destination. She steered for Land's End, and somewhere off the approaches a radio message told her which port to make for. The cargo had often been sold and resold while she was at sea.
- For orders — Sailing to a waiting point to be told where to go
- Gibraltar, Falmouth, Key West and Land's End all appear in the log as places to wait for instructions.
- Bunkers — The ship's own fuel
- Named for the coal bunkers of earlier ships. Taking bunkers meant refuelling — which is why Aden, Las Palmas, Gibraltar, Singapore and Curaçao appear so often. They were the filling stations of the sea.
- F.O. — Fuel oil
- D.O. — Diesel oil
- Gasoil — A light fuel oil, between diesel and heating oil
- F.W. — Fresh water — for the boilers, and for the crew
- In ballast — Sailing empty, with seawater pumped into the tanks for stability
- An empty tanker rides too high to steer or to be safe, so she floods her ballast tanks. Roughly half of David's sea time was spent carrying nothing at all.
- D/D, Dry dock — Out of the water for repair and painting
- A ship was docked every couple of years to have her bottom scraped and painted. The Naess Endeavour spent five weeks in dry dock at Rotterdam in 1970.
- Discharge — To unload the cargo
- Roads, roadstead — Sheltered water outside a harbour where ships anchor and wait
- Cowes Roads, Falmouth Roads, Spurn. Waiting for a berth could take days — David spent from June to July 1957 at anchor off Cowes, and went home for some of it.
- Canal transit — The passage through Suez, Panama or Kiel
- Ships went through Suez in timed convoys, so a ship might anchor for a day or two waiting her turn. The log records the exact hours in and out.
- P.G. — The Persian Gulf
- Written when a ship sailed for the Gulf without yet knowing which terminal she would load at.
- Via Cape — Round the Cape of Good Hope instead of through the Suez Canal
- Some 4,000 extra miles and about three weeks. A tanker took the long way either because she was too deeply laden to fit the Canal, or because the Canal was shut.
- Pilot — A local expert who comes aboard to con the ship through difficult water
- The master stays in command, but the pilot has the local knowledge. David's log notes the Barrier Reef pilot leaving at Thursday Island after 1,200 miles inside the coral.
- Berth — The particular place at a quay where a ship lies
- The log is precise about them — 'Huskisson Dock', 'Berth No. 8', 'Point Breeze' — because which berth you got decided how long you stayed.
- Articles, Home Trade / Foreign — The two kinds of crew agreement
- Home Trade Articles covered voyages around Britain and near Europe; Foreign-going Articles covered everything else, and could run up to two years.