Term
| What does the SCNS Bypass switch do? |
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Definition
| Applies power to the IDCU, BICU, DVS, INU and GPS overriding the scns control panel switch. If the bypass switch has been updated you won't just get ATT mode, you will get an alignment and NAV mode. |
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Term
| What are the four flight modes of SCNS? |
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Definition
| Flight Plan, Immediate, Rendezvous, and SAR |
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Term
| What does the IDCU use for its navigation solution (hint: 4 sources) |
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Definition
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Term
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Definition
| It is the primary interface with airplane sensors and converts signal inputs to digital data. |
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Term
| During sensitive steering ops, what is crosstrack (XTK)measured in? |
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Definition
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Term
| Where is the BICU located? |
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Definition
| Aft Center underdeck rack |
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Term
| Where does the BICU process information from? (you don't need to know this much seriously my gosh) |
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Definition
| inputs from the C-12 compasses, Number 2 vertical Gyro, free air temp bulb, IMS IFF altimeter encoder, and the differential pressure transducer. |
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Term
| What does the INS battery power? |
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Definition
INU and Nav's IDCU.
Turn SCNS OFF when not in use so you don't drain the INS battery. |
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Term
| If you get a SCNS failure what should you do? |
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Definition
| Tell the Pilots to select a non-scns mode. It is either a failure of all navigation solutions (you are screwed) or it is the interface to the pilot and copilots flight instruments. |
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Term
| If you don't turn the INU DIRECTLY to ON from the off position what can happen? (you go to ATT accidentally) |
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Definition
| the INU will default to orientation parameters causing pitch and roll to be reversed. |
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Term
What does a steady NAV ready light mean?
Flashing Nav ready light?
What stops the flashing? |
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Definition
Steady means 1.5 mins of alignment are complete.
Flashing means medium accuracy alignement is complete.
Going in to NAV mode. |
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Term
| What three velocities does the DVS measure? |
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Definition
| Heading Drift and Vertical |
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Term
| In ATT mode what are you getting? |
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Definition
| Only Pitch and Roll information. |
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Term
| Where is the GPS antenna located? |
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Definition
| Top Center of the fueselage |
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Term
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Definition
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Term
| What does the DIST TOO LRG message mean? |
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Definition
| last known position and entered position differ by 5nm or greater. |
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Term
| What do you do if you need to restart an alignment and you have already done one? |
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Definition
| Turn the INU switch off for at least 10 seconds. |
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Term
| How long does the initial alignment take? |
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Definition
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Term
| What is the max time between alignments? |
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Definition
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Term
| How long does the enhanced alignment take? |
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Definition
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Term
| hat is the ideal hdg change for an enhanced? |
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Definition
| 90 degrees ideal, at least 70 degrees for it to work. |
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Term
| How do you know your DTM took? |
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Definition
| LAST MSN ID and DTM MSN ID are the same |
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Term
| If almanac data is not available how long could the GPS initialization take? |
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Definition
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Term
What should your bank angle be set to for High Level?
Why? |
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Definition
20 degrees.
Autopilot's max bank angle is 25 degrees but your waypoint transitions are based on 30 degrees causing you to overshoot. |
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Term
| What can you add in the Flt parameters page to maximize SCNS accuracy? |
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Definition
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Term
| What is deleted when you use the flight plan reversal function? |
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Definition
| dz/lz info, toas and predicted winds and TAS |
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Term
| What does FOM 1 thru 5 represent in Meters? |
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Definition
| Less Than - 25, 50, 75, 100 and 200 |
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Term
| What radar mode provides the best azimuth resolution? |
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Definition
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Term
What button can you use to mark a radar point with the cursor? What does it show up as under your mark points?
How many can you store? |
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Definition
Right radar cursor control button.
With an R identifier.
One at a time, you erase your old mark everytime you do it. |
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Term
| What SHOULD you do that you never do when you are in parking prior to shut down? |
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Definition
| Update the system with parking spot coordinates. |
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Term
| What are the four SNCS navigation solutions? |
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Definition
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Term
| There are 6 Sub modes. What is primary? |
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Definition
| GI...after 4 mins of invalid GPS data, it goes to D-I |
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Term
| When is GPS data removed with regards to the poles? |
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Definition
| Within 10 nm of either pole. |
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Term
| What mode is active when the INU is invalid? |
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Definition
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Term
| When is DOP submode active? |
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Definition
| When GPS AND INU data is invalid |
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Term
| When is INS or inertial-only submode used? |
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Definition
| When GPS and DVS data is invalid |
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Term
| If you are in TAS or DOP mode what can you do to make it the most accurate? |
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Definition
| enter a compass deviation on the FLT PAR 2-3 page. |
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Term
| How many sattelites does the GPS reciever track at once? |
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Definition
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Term
| When looking at the GPS Status 3-3 page. Do you want the J/S (jamming to Signal) to be higher or lower? |
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Definition
| You want it to be LOWER. Lower jamming and higher signal = good |
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Term
What are the CEPs for an alignment?
An enhanced alignment? |
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Definition
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Term
| Do you have to have GPS or DVS for an air alignment? |
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Definition
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Term
How many Ref points?
Control Points?
DZ's?
LZ's
Waypoints?
Mark Points?
TOA's? |
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Definition
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Term
| If you put a TOA in, what does the enroute 3-5 page give you? |
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Definition
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Term
What should the waypoint transition be set to for low level flight?
High level? |
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Definition
Point to Point
Curved Path |
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Term
When is sensitive steering engaged for a run in?
What is one dot of XTK on the pilots HSI? (normal/sensitive) |
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Definition
when track angle error is less than 15 degrees, XTK is less than 1.5 nm and the airplane has passed the turnpoint.
1 dot is 1.5 nm in normal, 500 Yards in sensitive steering |
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Term
| What altitude is the MAP set at for vertical geometry? |
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Definition
| entered LZ elevation plus entered HAT |
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Term
| Can we get vertical advisories in SCNS past the MAP? |
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Definition
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