explosive device to elevate long wire antenna's into treesequipment

Dept of Defence issued equipment: trip wire for a wide range of usages including preventative, precautionary measures against enemy.Trip wire was an effective and valuable resource used by Australian soldiers for their protection and an advanced warning of enemy presence whilst in the field.Small cardboard roll of trip wire, attached to beige paper label with red text.IMPORTANT/ run wire through finger and thumb to remove kinks before use.trip wire, explosive device, booby trap, vietnam war, diamond valley vietnam veterans sub branch, weapons

Detonator (DET) An explosive device (not shown) is placed on the rail line and triggered by wheel pressure—used to warn of hazards aheadHistoric - Victorian Railways - Detonator (DET) Boxred box - DETS 7A Made of metal sheetDETS 7Apuffing billy, detonator (det) box

Three part exhibit featuring mine body, curved block of C4 explosive and firing device. Olive drab in colour and metal composition.Front towards enemy - on mine body. Test set electrical M18. Firing device electrical.m18 claymore mine, sas

Sapper Darren Smith was born in Adelaide, South Australia in November 1984. Darren enlisted into the Australian Army Reserve in November 2001 and subsequently transferred to the Australian Regular Army in October 2004. After five years service in the Royal Australian Engineers, Darren deployed to Afghanistan in March 2010 while posted to the 2nd Combat Engineer Regiment. Darren was involved in a route clearance task ahead of an Australian patrol in the Mirabad Valley on 7th June 2010. He and his Explosive Detection Dog ‘Herbie’, a 3-1/2 year old Collie Cross. were inspecting a suspected improvised explosive device when it was detonated by insurgents. Darren and Herbie were both Killed In Action by the blast.Sapper Darren SMITH and Army explosive detection dog "Herbie" were killed in action in Afghanistan in 2010.Brown timber frame containing reproduced photograph of armed soldier and dogSapper Darren Smith with (E.D.) Dog "Herbie" KIA Afghanistan 7.6.2010 darren smith, afghanistan, "herbie", australian army

A foghorn is a device that uses sound to warn of navigational hazards like rocky coastlines, or boats of the presence of other vessels, in foggy conditions. The term is most often used with marine transport. When visual navigation aids such as lighthouses are obscured, foghorns provide an audible warning of rocky outcrops, shoals, headlands, or other dangers to shipping. An early form of fog signal was to use a bell, gong, explosive signal or firing a cannon to alert shipping. From the early 20th century an improved device called the diaphone was used in place of these other devices, The diaphone horn was based directly on the organ stop of the same name invented by Robert Hope-Jones, creator of the Wurlitzer organ. Hope-Jones' design was based on a piston that was closed only at its bottom end and had slots, perpendicular to its axis, cut through its sides, the slotted piston moved within a similarly slotted cylinder. Outside of the cylinder was a reservoir of high-pressure air. Initially, this air would be admitted behind the piston, pushing it forward. When the slots of the piston aligned with those of the cylinder, air passed into the piston, making a sound and pushing the piston back to its starting position, whence the cycle would be repeated. This method of producing a low audible sound was further developed as a fog signal by John Northey of Toronto and these diaphones were powered by compressed air produced by an electric motor or other mechanical means that admitted extremely powerful low-frequency notes. The example in the Flagstaff collection is an early cased and portable diaphone used on pleasure or sailing craft. By manually turning the crank handle air is produced and fed into valves that direct air across vibrating metal reeds to produce the required sound. in foggy weather, fog horns are used to pinpoint a vessels position and to indicate how the vessel is sailing in foggy conditions. One blast, when sailing on starboard tack and two blasts, when sailing on a port tack and three dots, when with wind is behind the vessel. Since the automation of lighthouses became common in the 1960s and 1970s, most older foghorn marine installations have been removed to avoid the need to run the complex machinery associated with them, and have been replaced with an electrically powered diaphragm or compressed air horns. The example in the collection is significant as it was used in the early 19th century for sailing vessels was important but these portable crank fog horns have also been superseded by modern electric varieties. Therefore the item has a historical connection with sailing and maritime pursuits from our past.English Rotary Norwegian Pattern nautical foghorn within a boxed pine varnished case with exposed corner dovetailing, original leather carrying strap, brass side crank, and original copper trumped horn. Card accessory with Directions for Use in both English and French.Noneflagstaff hill, warrnambool, shipwrecked coast, flagstaff hill maritime museum, maritime museum, shipwreck coast, flagstaff hill maritime village, great ocean road, foghorn, maritime technology, maritime communication, marine warning signal, portable foghorn, bellows foghorn, crank handle, robert hope-jones, john northey

Bushfire behaviour is influenced by many factors including temperature, relative humidity (RH), forest type, fuel quantity and fuel dryness, topography and even slope. Wind has a dominant effect on the Rate of Spread (ROS), as well as fire size, shape and direction. Temperature and relative humidity have major impacts on fuel dryness and therefore upon the availability of fuel for combustion. The amount of fine fuel available can increase rapidly from nearly zero when fuel moisture content is more than 16% after rain or a heavy morning dew, to many tonnes per hectare as fuel dries out later in the day and the moisture content drops below 9%. This explosive escalation in the amount of available fuel can happen over a few hours on hot and windy days. A sling psychrometer is a simple device for determining air temperature and relative humidity. It contains two thermometers, one of which is covered with a wick saturated with ambient temperature liquid water. These two thermometers are called dry bulb and wet bulb. When the sling psychrometer is spun rapidly in the air, the evaporation of the water from the wick causes the wet bulb thermometer to read lower than the dry bulb thermometer. After the psychrometer has been spun long enough for the thermometers to reach equilibrium temperatures, the unit is stopped, and the two thermometers are quickly read. A psychrometric scale on the side of the instrument is then used to convert the dry bulb temperature TDB and the wet bulb temperature TWB into humidity information. The wet bulb temperature is approximately equal to the adiabatic saturation temperature. The thermometers fold back into the plastic handle when not in use. Used to measure temperature and relative humiditySling PsychrometerBACHARACH INSTRUMENTS - Pittsburg PAbushfire