Heliograph Large | |
Highly reflective stainless steel mirror, used for attracting attention by reflecting sunshine. Signal up to 40 miles on a clear sunny day. NB best used on a sunny day but can also be used to reflect moonshine or searchlight. Highly effective and it can be used continuously. Can be kept in a grab bag. Dimensions 100 mm x 100 mm x 2mm Weight 65 g |
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