• With steel pole Size 1.5mm dia with tilting type
• With steel pole Size 1.5mm dia without tilting type
• With steel pole Size 2.0mm dia with tilting type
• With steel pole Size 2.mm dia without tilting type
Consists of telescope eyesight and an adjustable tubular spirit level, which is connected to a semicircular protractor scale and vernier marked in both slope and degrees (90°).
A magnifier glass assists in accurate reading the degree of inclination from vernier.
• Made of Aluminium/brass.
• Size 100mm, 125 mm, 150 mm dia.
• Complete in Case with Aluminium Telescopic/Rigid/Wooden Tripod.
• Aluminium circle consist of a needle graduated to 30min (0.5) graduations.
• Painted with water proof paints.
• Carrying cases are made of Fibre with carrying straps. Least count 30'.
Rain gauge is designed to measure the precipitation. This small Version consisting of upper and lower housing part, measuring cylinder; Housing made of stainless steel, orifice rim made of brass.
Type 7019.0000 can be supplied with a receiving area of 100 cm2. (This type is not conforming to meteorological standards).
• Receiving area : 100 cm².
• Rain measure (graduated glass) : 250 cm³.
• Measuring range : 0 t0 25 mm precipitation (relative to a receiving area of 100 cm²).
• Graduation : 1/1 mm precipitation.
• Dimensions : dia 115 mm; height 300 mm.
• Weight : approx. 0.8 kg.
The Cross-Staff was used at sea from the beginning of the 16th century until the first half of the 18th century.
It was used to measure the sun's altitude, especially at the meridian passage. With the knowledge of the sun's declination, the mariner could then obtain his latitude.
The staff is original, with the inscription.
The cross pieces are replicas. Different cross pieces were used depending on the altitude.
A different scale is on each side of the staff.
Size 178 mm /7 Internal focusing, anti reflection coated optics with tilting arrangement and Fitted with revolving horizontal circle graduated to read 6 minutes with vernier and a provision to preset zero degree quickly.
The tilting drum is graduated to read 1 : 5000 is incorporated for fine adjustment and accuracy.
Supplied with accessories and adjusting tools Packed in PVC Plastic box with Aluminium telescopic stand in carrying canvas cover.
• Compass survey is a method of surveying by taking bearings and linear distances to produce plan.
• Bearing is measured using prismatic compass, while the linear distance is measured using measuring tape.
• Bearing in compass surveying means angle is made by chain line or survey line by referring it to magnetic meridian or magnetic north.
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