# T Nav Formulas 1600 Ton NC
**URL:** https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482
**Category:** Professional Mariner Forum
**Created:** [April 6, 2011, 8:56am UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482 "2011-04-06T08:56:44Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@DSV\_Captain](https://forum.gcaptain.com/u/DSV_Captain)
#### Post date: [April 6, 2011, 8:56am UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/1 "2011-04-06T08:56:44Z")
Anyone have the T Nv formulas in an easy to remember format taking T Nav test tommorow t REC New Orleans So Far so good have passed 4 modules doing chart plot today
Thanks
---
### Author:  [@Miek](https://forum.gcaptain.com/u/Miek)
#### Post date: [April 6, 2011, 9:19am UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/2 "2011-04-06T09:19:38Z")
I don’t have any easy solutions but I have all the information in a PDF file your welcome to it if you like.
---
### Author:  [@B\_ry](https://forum.gcaptain.com/u/B_ry)
#### Post date: [April 6, 2011, 11:30am UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/3 "2011-04-06T11:30:18Z")
If you will send me your email address I can send you some helpful info
---
### Author:  [@Oldsalt206](https://forum.gcaptain.com/u/Oldsalt206)
#### Post date: [April 6, 2011, 3:26pm UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/4 "2011-04-06T15:26:31Z")
Yikes! You are testing tomorrow? You should have asked this question 6 months ago.
---
### Author:  [@DSV\_Captain](https://forum.gcaptain.com/u/DSV_Captain)
#### Post date: [April 6, 2011, 6:24pm UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/5 "2011-04-06T18:24:33Z")
Yea got it but just seeing if anyone has a way the remember the formulas better such as subtracting and adding on Amptitudes, and sunrise sunset those are the ones giving me a hard time,
Failure is not and option
Success is and I choose to succeed one more test the done
---
### Author:  [@hom4us4](https://forum.gcaptain.com/u/hom4us4)
#### Post date: [April 6, 2011, 6:57pm UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/6 "2011-04-06T18:57:40Z")
Any formula needed for T-Nav can be found in Bowditch Vol. II and the almanac good luck\
### Author:  [@New3M](https://forum.gcaptain.com/u/New3M)
#### Post date: [April 6, 2011, 7:22pm UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/7 "2011-04-06T19:22:08Z")
[QUOTE=DSV Captain;48499]Yea got it but just seeing if anyone has a way the remember the formulas better such as subtracting and adding on Amptitudes, and sunrise sunset those are the ones giving me a hard time,
Failure is not and option
Success is and I choose to succeed one more test the done[/QUOTE]
With the subtracting and adding for amplitudes and sunrise and sunset, just use some common sense. If it’s sunrise, it’s has to be somewhere near 090, since the sun rises in the east. Sunset, somewhere near 270, since the sun sets in the west. What you calculate has to come out close to what you shot (or what the question gives you). There’s formulas for them all, but just use common sense. If your answer is 180 off, it’s probably the other way.
---
### Author:  [@B\_ry](https://forum.gcaptain.com/u/B_ry)
#### Post date: [April 6, 2011, 10:39pm UTC](https://forum.gcaptain.com/t/t-nav-formulas-1600-ton-nc/5482/8 "2011-04-06T22:39:34Z")
On you zone time if you add to get Greenwich time then when you do the GHA you subtract . If you subtract on the zone time to get Greenwich time then you add your GHA . I think I sent you some PDF look at the azimuth and amplitude problems and this will make more since .