The passport card can be used at U.S. land and sea ports of entry when arriving from Canada, Mexico, the Caribbean and Bermuda. The card may not be used to travel by air.
A refrigerator maintains a temperature a few degrees above the freezing point of water. Optimum temperature range for perishable food storage is 3 to 5 Â°C (37 to 41 Â°F).emperature settings for refrigerator and freezer compartments are often given arbitrary numbers by manufacturers (for example, 1 through 9, warmest to coldest), but generally 3 to 5 Â°C (37 to 41 Â°F) is ideal for the refrigerator compartment and â18 Â°C (0 Â°F) for the freezer.
For perishable foods, the maximum temperature would be 40Â°F (4.4Â°C). But vacuum-packaged seafood should not be above 38Â°F (3.3Â°C) due to the possibility of the formation o â¦ f the botulism toxin.   Normally, higher settings will have the refrigerator run more efficiently since it won't have to run as hard to maintain the temperature.acterial and mold growth are considerably slowed down at these temperatures, thus retarding food spoilage. Since water freezes at 0Â°C (32Â°F), this prevents fresh foods from freezing, although when the temperature is at the low end of the range, some areas in the refrigerator may be below the freezing point.