Crew Health Research Articles

ELIMINATION OF MAIN STEAM BOILER TUBE FAILURES CAUSED BY EXCESSIVE VIBRATION ON AFS 1 CLASS SURFACE SHIPS

ABSTRACTExcessive ship environmental vibration can adversely affect crew comfort, health, and proficiency. It can also cause abnormal mechanical wear, and, in cases of extreme vibration, induce component failure and shut‐down of ship's machinery and equipment.This paper describes corrective action taken on USS MARS in the AFTS 1 Class to eliminate main steam boiler tube fatigue failures caused by resonant vibration conditions. The failures resulted from violent “harpstring like” bending vibration of the approximately 14‐foot long, one‐inch O.D. boiler tubes excited by propeller blade rate hull vibration. Stiffening bars, 5/8‐inch square, were installed between the boiler tube rows to raise tube bending vibration natural frequencies beyond the operating range of propeller blade rate excitation. Post‐alteration underway tests on MARS showed that stiffening reduced tube vibration to acceptable levels.Causes and effects of ship's hull, machinery, and equipment vibration are discussed, together with recommended design changes and administrative action to control ship vibration.

Development of Skylab medical equipment and flight preparations

The purpose of this report is to provide an introduction and overview of the Skylab medical program. Some of the more important medical systems and equipment provided for crew sustenance are described. The major inflight medical experiments are reviewed, and the test programs are discussed. The medical operations procedures and the techniques used to monitor crew health are reviewed to provide an understanding of the medical management of this complex mission.

漁業練習船における傷病発生状況について-I(日本航海学会第36回講演会)

There are many problems awaiting solution to keep health of crew in the present pelagic fishing boats. This paper summarizes the results investigated in the practices of oceanographic observations, exploratory tuna long-line fishings, and trawlings in the waters of Bering Sea and tropics during the extensive cruises, 1963-65, on board the fishery training ship belonging to the Shimonoseki University of Fisheries. From the data obrained we conclude as follows: -1. Peculiarities of patients varied with the term of navigation, cruising areas, nature of operation, conveniences in the ship, the number of embarking persons, condition of health after embarkment, etc. 2. Three main diseases in the rate of outbreak were gastro-intestinal, respiratorical, and surgical. 3. The rate of crew's gastro-intestinal diseases was higher than students' and of student's respiratorical diseases was higher in tropics than in cold waters, and student's surgical diseases increased as the navigation was prolonged, compareing with crew's.

船員の航海中の血圧について

The sailors on board a steam-ship are usually left to a special life-environment in all respects, especially temperature, victuals and drinkables, and living place. On this fact the authors considered that the health of crew, say, their blood-pressures might be greatly influenced by such circumstances and found, after many years of medical experiences in a ship-clniic that these particular circumstances had more or less effects on some natures of their blood-pressures, by means of statistical observations on 500 sailors on voyage. As the plan of the investigation, two main classifications were made: on for age and period of service at the sea, and the other for a high temperature department and on ordinary one as to the position in the ship. The investgations led the authors to the following conclusions. A) As to the blood-pressure by age, nothing unusual is observed of the crew below 19 years of age, and few between 20 and 49 of age have high blood-pressures, while most of the crew aged between 40 and 49 years have obviously low ones. B) As for the length of sea service, are found in the group of more than 10 years low blood-pressure. C) As for the position in the ship, the crew bring in the high temperature department have rather low blood-pressures, compared with those living in ordinary places in temperature.

Tuberculosis : A Note on the Health of Crews and Ship Hygiene, by W. M. WILLOUGHBY, M.D., D.P.H., Medical Officer of Health, Port of London (Fellow)

Tuberculosis : A Note on the Health of Crews and Ship Hygiene, by W. M. WILLOUGHBY, M.D., D.P.H., Medical Officer of Health, Port of London (Fellow)