Operating Instructions and Installation Instructions
233 
Naparima BWI 
Trinidad & Tobago 
North American 1927 
Mean for Antigua, 
Barbados, Barbuda, 
Caicos Islands, 
Cuba, Dominican 
Republic, Grand 
Cayman, Jamaica, 
Turks Islands 
North American 1927 
Mean for Belize, Cos-
ta Rica, El Salvador, 
Guatemala, Hondu-
ras, Nicaragua 
North American 1927 
Mean for Canada 
North American 1927 
Mean for CONUS 
(Continental United 
States) 
North American 1927 
Mean for CONUS 
(East of Mississippi 
River) including Lou-
isiana, Missouri, Min-
nesota 
North American 1927 
Mean for CONUS 
(West of Mississippi 
River) 
North American 1927 
Alaska 
North American 1927 
Bahamas (Except 
San Salvador Island) 
North American 1927 
Bahamas (San Sal-
vador Island) 
North American 1927 
Canada (Alberta, 
British Columbia) 
North American 1927 
Canada (Manitoba, 
Ontario) 
North American 1927 
Canada (New 
Brunswick, New-
foundland, Nova Sco-
tia, Quebec) 
North American 1927 
Canada (Northwest 
Territories, Sas-
katchewan) 
North American 1927 
Canada (Yukon) 
North American 1927 
Canal Zone 
North American 1927 
Cuba 
North American 1927 
Greenland (Hayes 
Peninsula) 
North American 1927 
Mexico 
North American 1983 
Alaska, Canada, 
CONUS 
North American 1983 
Central America, 
Mexico 
Observaorio Metereo 
1939; Azores (Corvo 
& Flores Islands) 
Old Egyptian 1907 
Egypt 
Old Hawaiian 
Mean for Hawaii, 
Kauai, Maui, Oahu 
Old Hawaiian 
Hawaii 
Old Hawaiian 
Kauai 
Old Hawaiian 
Maui 
Old Hawaiian 
Oahu 
Oman 
Oman 
Ordinance Survey 
Great Britain 1936 - 
Mean for England, 
Isle of Man, Scotland, 
Shetland Islands, 
Wales 
Ordinance Survey 
Great Britain 1936 - 
England 
Ordinance Survey 
Great Britain 1936 - 
England, Isle of Man, 
Wales 
Ordinance Survey 
Great Britain 1936 - 
Scotland, Shetland 
Islands 
Ordinance Survey 
Great Britain 1936 - 
Wales 
Pico de las Nieves 
Canary Islands 
Pitcairn Astro 1967 
Pitcairn Island 










