T-Nav Flashcards
How many satellites can each MMR/EGI+ track? 
12
Which components does the MMR/EGI+ use information from to estimate the aircraft state? 
INU/GPS (MMR/EGI+), DRVS, HADS, and the MP
From which page is the manual primary INU selection made?
TSD-UTIL Page
What is the function of the DRVS in the NAV system?
Provides aircraft referenced ground velocity information to the EGI’s. 
When does the “ altitude lo” audio activate?
10’ or less- audio upon breach
11’-999’ - audio at 10% below setting
1000’-20,000’ - audio at 100’ below setting
What database points will the crew gain access to by selecting the COORD - TYPE page?
System, User, ASE, and DAFIF
Which page would you go to in order to view the shot-at coordinates?
COORD- Shot page
The control measure coordinates are stored in which fire locations within the 1000 point database
Reserved positions 51-99 and displayed as C51-C99. Once 51-99 are filled, points will go into the shared area. (100-950)
The waypoint and hazards are stored in which file locations within the 1000-point database?
Reserved positions 01-50, and displayed as Wxx or Hxx, where xx is 01-50. Once 1-50 are filled, points will go into the shared area (100-950)
When present position (PP) reports are received, they are stored as what type of point?
System Point(s)
Can the targets and threats (T01-T25), loaded from the RMM be over written, using store or add function?
No. Not by the crewmember. However, if you receive an IDM target indexed with a number that would be in your safe set, it will overwrite the current safe set value. 
The TSD correlates what two types of information on a single display?
Navigation and Battle Management
What do the boxed selections indicate when the NAV and ATK SHOW pages are initially selected?
Default settings
Which SHOW pages have separate NAV and ATK selections?
Top level SHOW and COORD SHOW (subpage)
The EGI’s POSITION CONFIDENCE value on the TSD-UTIL page provides what?
Provides a 95% radial error estimate, in meters, of how good the EGI’s PP information is.
Which page displays the EGI satellite tracking information to the aircrew?
TSD-UTIL page
Name the two ways the crew can get to the abbreviations page.
TSD-UTIL ( then ABR at T4)
TSD-POINT ( then ABR at T4)
Can the NAV FLY-TO be turned off on the flight page?
No, only selectable for HMD
What page can the crew go in order to remove the NAV FLY-TO Cue from their HMD?
TSD, SHOW, HMD SHOW, then deselect at R2.
What information is displayed in the Next WP Status window?
The Fly-To Point, Distance to Fly-To, Groundspeed, and Time till arrival based on current groundspeed.
Which pages, buttons, or tasks freeze the TSD map while specific tasks are being accomplished?
BAM, CAQ, FRZ, PAN
A TSD pop-up menu will appear when you Cursor Select what type of point?
A waypoint, hazard, control measure, target, DAFIF, SA icon.
Where are the current magnetic HDG and the magnetic HDG to the next WP location?
Magnetic HDG: Top center of the TSD magnetic HDG to next WP: bottom center of the TSD
What piece of equipment provides SA information?
The IDM- provided you are logged into the Tactical Internet
When one of more messages exist in the IDM message buffer, what indication does the crew get on the TSD page?
A white REC will appear at L2 on the TSD base page.
What does the number between the up and down arrows at (R1 and R2) indicate on the TSD page?
The number indicates the Map Viewing Range, distance from edge-to-edge of the MPD.
What is DTED?
Digital Terrain Elevation Data. (map elevation detail)
What types of maps are available for display on the MPD?
Digital (dig), Tactical Chart (TAC Chart), Satellite (sat), Civilian Chart, and Stick.
A grid status window appears in the upper right corner of the TSD when the grid option is active. What does it represent?
Distance between the grid lines.
What does a gray screen with a black cross pattern area of the map indicate?
The default scale map is not loaded on the RMM.
What 3 map orientation options are available from the Map page? Which orientation is the default option?
North-up, Track-up (default), and Heading-Up.
What types of points can be stored?
WP, HZ, CM, TG, and MK.
What is an identifier?
And identifier is the two letters from the abbreviations page that will further identify a coordinate point beyond the type and determine the TSD icon presented.
What process allows the crewmember to change the IDENT as desired?
The EDIT process.
What will be used to compute altitude when adding points?
DTED, then aircraft present position altitude.
The three methods available to complete a way point store must be initiated from which page?
TSD- POINT- STO- TYPE to WP
During the add or edit process, the crewmember uses the KU to add/edit data in the database. What information will be entered if no keyboard entry is made, and the crewmember simply selects enter on the KU?
The information displayed at L1 is automatically accepted as the data for that portion of the add/edit process.
How many points can be placed in a route?
400
What is the ADD button used for?
To ADD an existing point to a route.
How is the RTM page accessed?
Only through the RTE page. RTE-RTM
How should points be inserted into a RTE?
Select ADD option on the RTE PAGE
Select the “in front of” location for the point
Select the point
(Added below the highlighted point)
“WPT approach” will display on the EUFD under what conditions?
1 min out from the point with neither crew station displaying a TSD. Selecting the TSD will clear the message.
What types of points can be added to a route?
Waypoints, Hazards, Control Measures, Targets, and DAFIF.
What is the purpose of the BAM page?
Create, assign, and transmit (PF) zones
Create and transmit (NF) zones
View hellfire exclusion zones (HF)
Assign non-target designation (NT) zones
What is the maximum amount of PF zones that can be displayed in the TSD?
8
In what color are NF zones displayed?
Yellow
How can the crew determine which PF/NF zones are active?
Displayed as a scrolling marquee.
Which PF/NF zone draw mode allows the crewmember to form rectangular boxes by selecting two points with the cursor?
Box
What is the purpose of the Zone Number (#Z) button?
To determine how many zones will drawn before presenting the ASN button.
When is the PF ASN button displayed?
After the selected number of zones have been drawn.
When will the Update Position Advisory message be displayed on the EUFD?
When the primary EGI PC is greater than 1850M.
How long does it approximately take to complete an EGI IBIT?
Five and one-half minutes (5.5 min)
What will happen to the altitude readouts when the radar altimeter performs a functional BIT on power-up of the unit?
Altitude readout will rise to approximately 1000ft and then return to zero.
How long does it approximately take to complete a Doppler IBIT?
20 seconds
How much error exists if you are experiencing a Velocity Miscompare?
> 10 kts in any axis
How much error exists if you are experiencing an Attitude Miscompare?
> 3 degrees in either pitch or roll
How much error exists if you are experiencing a Heading Miscompare?
> 4 degrees
When will a HDG button appear at L5 on the TSD and what advisory message will be displayed in the EUFD when the white HDG button appears?
HDG will appear when the primary EGI heading is off by least 10°. The associated message in the EUFD will be UPDATE HEADING.
How many preplanned AMPS routes can be pre-loaded into the system?
Up to 10 Routes containing WPs, HZs, CMs, TGs and DAFIF
What does the Internal Navigation Unit (INU) provide
Aircraft position, attitudes, rates, and accelerations to the Mission Processor (MP) for ballistic computations and weapons constraint calculations
Describe the Kalman Filter
Inertial navigation computations used to determine Aircraft Data (uses INU, DRVS, GPS, HADS, MP)
What does aircraft data derived from the EGI’s consist of?
Heading, Attitude, Velocity, Position, Position Error Estimate, Angular Rate, Acceleration
What are the four different types of alignment that are done by MMR/EGI?
Land, Sea - Moving, Sea - Stationary, Air
How long does it take at least one EGI to find its heading within 10 degrees?
70 sec
How long does it take for EGI alignment to be completed?
4 min
Once EGI has found its heading to within 10 degrees what symbology becomes available?
Skid/Slip Ball, Heading Scale, and Lubber Line
What are the two independent subsystems that make up the Air Data System?
HADS (Helicopter Air Data System), FMC (Flight Management Computer)
What does the HADS provide to the ADS?
Airspeed magnitude and direction. Ambient temperature and static pressure.
What role does the FMC play in the ADS?
Computes pressure altitude, pitot airspeed, density altitude related data and air mass data to be used by the MP
What is the role of the Doppler Radar Velocity Sensor (DRVS)?
Provides aircraft referenced ground velocities
The TSD-UTIL page will show this symbol when the DRVS data is in use.
Check mark in column D
Radar readout will not be displayed above what altitude?
1420’
1428’ is the physical limit of the system.
Selecting the left VAB on the TSD-COORD page will…
Make the selected point your acquisition source
Selecting the right VAB on the TSD-COORD page will…
Display additional data about that point
The User Point database will allow 1000 points under four types. What are the four types?
WP (Waypoint), HZ (Hazard), TG (Targets), Control Measures (CM)
System Points are single use data points. What is the most important of the 17 possible system points?
PP (Present Position)
What is the rule for color coding on Control Measure abbreviations?
General - Green
Friendly - Blue
Enemy - Red
The shaded region (overflow) in the user point data can be split up into how many sections?
8
Lines contain between ____ and _____ points.
2, 4
(T)(F) Lines can only be loaded via AMPS.
True
(T)(F) The maximum number of lines that can be stored in the NAV data base is 15.
True
The edge of shading of the ____________________ on the THRT SHOW page will show the ___________________.
intervisibility ring, furthest visible point from the origin.
EGI position confidence is displayed white if…
error is greater than 50 meters
What is Height Above Ellipsoid?
The differential reference height from the mean ellipsoid height. HAE is used for more accurate target locations
What are the different levels of DTED?
0, 1, and 2
What is the difference between DTED levels?
Estimation of elevation takes into consideration more points providing a “higher resolution” estimation.
A/C color banding is a function of the altimeter setting and shall not be used as the sole source of terrain separation. Why?
It is an estimation.
What are the two levels of SAT maps?
5 and 10
In the North-Up orientation what is the difference between centered and decentered?
Decentered: Ownship moves about the map
Centered: Ownship will rotate in the center
What is the implied meaning of a transparent purple color on the map?
DTED coverage not available, DTED not loaded on RMM, or Processing delay
What are the 3 different ways that you can store a point?
HMD LOS, TADS LOS, or Fly Over Store
ETE/ETA for route points is given based on…
Flying the entire route and not flying direct
What is the symbology that indicates the current fly-to point in the route window?
White underline
What will happen after reaching a DIR-TO point that is inside a route?
The next point in the route will become the Fly-To, the Dir-To line will vanish and the route will now bold
Why would you receive a WPT APPROACHING advisory on the EUFD?
You are 60 seconds away from your waypoint and neither crewstation is monitoring a TSD page
