Robert T. Paige
Member
Hello Jim and Michael -
This is admittedly a rather old comment on an old thread that I'm refering to :
Michael-
>> know for a fact that such instruments exist today because I've seen them in use on the bridge of the USS Comstock. What I'm not sure of is the source of the data they use but I suspect it may be either GPS or SINS.<<
I'll have to admit my "Bridge Experience" on the USS Kenneth Whiting was solely to check out the radar repeater, so I wasn't aware of any other instruments. But that was way back in the dark ages of the previous century.
Jim-
>>that is by establishing two correct, exact positions and measuring or calculating the distance between them then applying lapsed time.<<
I've checked my car's speedometer by using a stopwatch between mile markers. For example at 60MPH it should take exactly 60 seconds between mile markers. But even my relatively cheap GPS gives me accurate speed readings of the car.
This is admittedly a rather old comment on an old thread that I'm refering to :
Michael-
>> know for a fact that such instruments exist today because I've seen them in use on the bridge of the USS Comstock. What I'm not sure of is the source of the data they use but I suspect it may be either GPS or SINS.<<
I'll have to admit my "Bridge Experience" on the USS Kenneth Whiting was solely to check out the radar repeater, so I wasn't aware of any other instruments. But that was way back in the dark ages of the previous century.
Jim-
>>that is by establishing two correct, exact positions and measuring or calculating the distance between them then applying lapsed time.<<
I've checked my car's speedometer by using a stopwatch between mile markers. For example at 60MPH it should take exactly 60 seconds between mile markers. But even my relatively cheap GPS gives me accurate speed readings of the car.