Renseignements généraux

Nº de série

S/O

Nº de partie

1

Nombre total de parties

3

Ou

S/O

Brevets

S/O

Description générale

plastic, synthetic

Dimensions

Remarque : Cette information reflète la taille générale pour l’entreposage et ne représente pas nécessairement les véritables dimensions de l’objet.

Longueur

12,0 cm

Largeur

8,5 cm

Hauteur

3,5 cm

Épaisseur

S/O

Poids

S/O

Diamètre

S/O

Volume

S/O

Lexique

Groupe

Transports maritimes

Catégorie

Instruments et équipement de navigation

Sous-catégorie

S/O

Fabricant

Ou

Ritchie

Pays

United States of America

État/province

Massachusetts

Ville

Boston

Contexte

Pays

Canada

État/province

Ontario

Période

ca: 1985 -1997

Canada

Typical of compass used in Canada and elsewhere in North America. Was bought and used by CSTMC former curator, John Corby. "I bought this compass at a Montreal boat show in the mid-80's after my anchor dragged overnight and I found myself embarrassingly close to other vessels in the anchorage and from then on made it a rule to re-check my position before going to bed."

Fonction

Used by mariners to ascertain the relative position of the other points of the compass to magnetic north.

Technique

Example of a modern mariner's compass. Used a special battery, non-magnetic, no longer produced. This kind of compass is surpassed now by GPS. The modus operandi is as follows: pressing the button illuminates the dial of the compass and shows a red dot. When this aligned with a fixed object, either ashore or afloat a reading of the compass is noted. Then another reading on another object is taken, the spread between the tow being ideally around 60-120 degrees. The results are plotted on the chart and the intersection of the two bearing lines indicate the boat's position.

Notes sur la région

Inconnu

Détails

Marques

Raised emboseed Mfr's markings on front of the casing: "RITCHIE"

Manque

No missing parts.

Fini

The sides of casing are glossy black and the front and back of casing are a matt finish.The compass dial is white with black markings. Two metal front buttons.

Décoration

A raised embossed line of a wave design is found on the front of the casing under the Mfr's markings and under the wave design is a straight raised line.