The term cross-staff, also Jacob's staff, ballastella, balestilha, or fore- staff is used to refer to several things. The two most frequent uses are: in astronomy and navigation for a simple device to
Cross-Staffs | 2017-2020 Prediction Project Website
Wooden Cross-staff. | Science Museum Group Collection
Divine Cross Staff Gold - Cappel's
Processional Cross w/Metal Staff - O'Connors Church Supply
Cross-staff, artwork - Stock Image - C007/0072 - Science Photo Library
1661 Kronan cross-staff (reproduction) - the homepage of Nicolàs de Hilster, PhD
Navigation: Cross-staff Photograph by Granger - Fine Art America
Cross-Staff - Ages of Exploration
1661 Kronan cross-staff (reproduction) - the homepage of Nicolàs de Hilster, PhD
The Cross Staff
1720 Hasebroek cross-staff (reproduction) - the homepage of Nicolàs de Hilster, PhD
File:Cross-staff-MnM 11 NA 5-IMG 5989-white.jpg - Wikimedia Commons
Aluminium Cross Staff, For Leveling
Cross-staff | COSMOS
1720 Hasebroek cross-staff (reproduction) - the homepage of Nicolàs de Hilster, PhD
VISHAL Cross Staff Aluminum 4" 100 mm Non-magnetic Bull's Eye Level Price in India - Buy VISHAL Cross Staff Aluminum 4" 100 mm Non-magnetic Bull's Eye Level online at Flipkart.com
June | 2017 | Voynich Portal
Wooden Cross-staff. | Science Museum Group Collection
Using a Cross Staff | Time and Navigation
ION Museum: Back-staff
Cross staff! Chain and cross staff survey! open cross staff construction! use! - YouTube
The cross-staff (14 th century) was an ancient precursor to the marine... | Download Scientific Diagram
