instance_of biskop hvoslef
The Biskop Hvoslef is a veteran Norwegian sailing vessel built in 1933 that was used in search and ___MASK75___ by the Redningsselskapet ( Norwegian Society for ___MASK75___ at Sea ) on the Norwegian coast between 1933 and 1969 . It is now a privately owned vessel . ___MASK16___ is the flow of gases on a large ___MASK66___ . On the ___MASK79___ of the Earth , wind consists of the bulk movement of air . In outer space , solar wind is the movement of gases or charged particles from the Sun through space , while planetary wind is the outgassing of light chemical elements from a planet ' s atmosphere into space . Winds are commonly classified by their spatial ___MASK66___ , their speed , the types of forces that cause them , the regions in which they occur , and their effect . The strongest observed winds on a planet in the Solar System occur on Neptune and Saturn . Winds have various aspects , an important one being its velocity ; another the density of the ___MASK20___ involved ; another its energy content or wind energy . ___MASK26___ of sail is a ___MASK90___ used to describe a sailing boat ' s orientation in ___MASK38___ to the current wind direction . Life is a characteristic distinguishing physical entities having biological processes , such as signaling and self - sustaining processes , from those that do not , either because such functions have ceased , or because they never had such functions and are classified as inanimate . Various forms of life exist , such as plants , animals , fungi , protists , archaea , and ___MASK67___ . The criteria can at times be ambiguous and ___MASK63___ or ___MASK63___ not define viruses , viroids , or potential artificial life as " living ". Biology is the primary science concerned with the study of life , although many other sciences are involved . ___MASK75___ comprises responsive operations that usually involve the saving of life , or prevention of injury during an incident or dangerous situation . On boats and ships , keel can refer to either of ___MASK72___ parts : a structural element that sometimes resembles a fin and protrudes below a boat along the central line , or a hydrodynamic element . These parts overlap . As the laying down of the keel is the initial step in the ___MASK92___ of a ___MASK77___ , in British and American shipbuilding traditions the ___MASK92___ is dated from this event . Only the ___MASK77___ ' s launching is considered more significant in its creation . Sailing comprises ___MASK16___ propulsion of a ___MASK8___ by means of sails or other airfoils and steering it over water , ice or land , depending on the type of ___MASK8___ . A sailor manages the force of the ___MASK16___ on the sails by adjusting their angle with respect to the moving sailing ___MASK8___ and sometimes by adjusting the sail area . The force transmitted from the sails is resisted by forces from the hull , keel , and rudder of a sailing ___MASK8___ , by forces from skate runners for an iceboat , and by forces from wheels for a land sailing ___MASK8___ to allow steering a course on a point of sail with respect to the true ___MASK16___ . An airfoil ( in American English ) or aerofoil ( in British English ) is the ___MASK34___ of a ___MASK55___ , blade ( of a propeller , rotor , or turbine ), or sail ( as seen in cross - section ). A rudder is a primary control ___MASK79___ used to steer a ___MASK77___ , boat , submarine , hovercraft , aircraft , or other conveyance that moves through a fluid medium ( generally air or water ). On an aircraft the rudder is used primarily to counter adverse yaw and p - factor and is not the primary control used to turn the airplane . A rudder operates by redirecting the fluid past the hull ( watercraft ) or fuselage , thus imparting a turning or yawing motion to the craft . In basic form , a rudder is a flat plane or sheet of material attached with hinges to the craft ' s stern , tail , or after end . Often rudders are shaped so as to minimize hydrodynamic or aerodynamic drag . On simple watercraft , a tiller  essentially , a stick or pole acting as a lever arm  may be attached to the top of the rudder to allow it to be turned by a helmsman . In larger vessels , cables , pushrods , or hydraulics may be used to link rudders to steering wheels . In typical aircraft , the rudder is operated by pedals via mechanical linkages or hydraulics .