DESCRIPTION OF THE SHIP AND 

 APPLIANCES USED FOR SCIENTIFIC EXPLORATION 



BY 



G. F. TYDEMAN. 



W i t h 3 p 1 a t e s and illustrations. 



H. M. twin-screw Gun-boat "Siboga", of the Dutch East India Military Marine Service 

 was built in 1897 by the Netherland Ship-building Company at Amsterdam. 



The vessel is of steel, has twin screws, bilge-keels, steam-capstan, steam-steering-gear, 

 electric light and search-light, two triple-expansion engines, tvvo cylindrical boilers iitted with 

 forced draught and one auxiliary boiler. 

 The principal dimensions are : 



Length 50.60 metres 



Extreme width 9-4° „ 



Average draught when full loaded 3.308 „ 

 Displacement at above draught. . 810 tons. 



The armament consists of: 



2 Krupp guns of 10.5 centimetres (1 fore and 1 aft). 

 4 quick-firing guns of 3.7 centimetres. 

 2 revolving „ „3.7 



The engines were designed for 1100 I. H. P. collectively, but developed on the trial 

 trip 1395 I. H. P., at 219.6 revolutions; the speed attained was 13.8 knots with a coal-con- 

 sumption of 1.108 kilograms per I. H. P. per hour. With 201 I. H. P. and 120 revolutions a 

 speed of 8.34 knots was attained. 



One of the longboats is a steamlaunch 7.62 metres (25 ft.) long. 



SIBOGA-EXrEDITIE II. I 



<*?5Ü 



