Spaceship Medic
Encyclopedia
Spaceship Medic is a 1970 science fiction
Science fiction
Science fiction is a genre of fiction dealing with imaginary but more or less plausible content such as future settings, futuristic science and technology, space travel, aliens, and paranormal abilities...

 novel
Novel
A novel is a book of long narrative in literary prose. The genre has historical roots both in the fields of the medieval and early modern romance and in the tradition of the novella. The latter supplied the present generic term in the late 18th century....

 for young people by Harry Harrison
Harry Harrison
Harry Harrison is an American science fiction author best known for his character the Stainless Steel Rat and the novel Make Room! Make Room! , the basis for the film Soylent Green...

.

Plot

On a routine trip to Mars
Mars
Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

, the passenger liner Johannes Kepler is hit by a meteorite
Meteorite
A meteorite is a natural object originating in outer space that survives impact with the Earth's surface. Meteorites can be big or small. Most meteorites derive from small astronomical objects called meteoroids, but they are also sometimes produced by impacts of asteroids...

, killing the captain and almost all the senior members of the crew and resulting in the loss of much of the ship's breathable air. Lieutenant Donald Chase, a junior medical officer, finds himself the highest-ranked surviving crew member and has to take over the running of the ship. He is helped by Chief Petty Officer
Chief Petty Officer
A chief petty officer is a senior non-commissioned officer in many navies and coast guards.-Canada:"Chief Petty Officer" refers to two ranks in the Canadian Navy...

 Kurikka, who is familiar with the technical aspects; the Mexican scientist Dr Ugalde, a passenger whose mathematical genius enables the new crew to navigate the ship; and various others. Chase solves the air shortage by using the oxygen
Oxygen
Oxygen is the element with atomic number 8 and represented by the symbol O. Its name derives from the Greek roots ὀξύς and -γενής , because at the time of naming, it was mistakenly thought that all acids required oxygen in their composition...

 content of some of the ship's water
Water
Water is a chemical substance with the chemical formula H2O. A water molecule contains one oxygen and two hydrogen atoms connected by covalent bonds. Water is a liquid at ambient conditions, but it often co-exists on Earth with its solid state, ice, and gaseous state . Water also exists in a...

. Once the situation has stabilised, a passenger, General Mathew Briggs, who had criticised Chase's methods, overthrows him by force with the apparent help of Ugalde. However, it turns out that Ugalde had only pretended to shift his loyalties and Briggs is faced down by Kurikka, defeated and imprisoned. The ship's occupants are also struck by a deadly plague carried by the meteorite, but Chase and his medical colleagues eventually find a cure, although Chase collapses from disease and exhaustion. Recovering in hospital after the ship has docked safely, he is presented with a captain's cap by his crew.
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