Sextant, as in CARRY ON, MR. BOWDITCH by Jean Lee Latham. Teachers, make this book real and fun in straight-from-the-story ways! Hands-on, multisensory activities, academic handouts, and lots more -- all in one place! Get the LitWits Kit at https://litwits.com/product/carry-on-mr-bowditch/
Shipwreck found with Viking sun stone An oblong crystal found in the wreck of a 16th-century English warship is a sunstone, a near-mythical navigational aid said to have been used by Viking mariners. source
An old vernier sextant. Beautiful! Measuring the Altitude and angles of the sun. Similar instruments used for surveying geography. The team approach having a group of friends make conversations that survey a persons character gently without making offence.
Curta Mechanical Calculator, a small, hand-cranked mechanical calculator introduced by Curt Herzstark in 1948. It can be used to perform addition, subtraction, multiplication, division, and (with more difficulty) square roots and other operations. considered the best portable calculators available until they were displaced by electronic calculators in the 1970s.