Help with nav

[pilotwondermiss]

hi boyss and girls im having some problems with calculating these here for rad nav cab anyone help out?

AN AIRCRAFT, AT FL 410 IS PASSING OVERHEAD A DME STATION AT MEAN SEA LEVEL. THE DME INDICATES APPROXIMATELY:




AN NDB IS ON A RELATIVE BEARING OF 316° FROM AN AIRCRAFT.
GIVEN:
COMPASS HEADING 270°
AT AIRCRAFT DEVIATION 2°W, VARIATION 30°
AT STATION VARIATION 28°E,
CALCULATE THE TRUE BEARING OF THE NDB FROM THE AIRCRAFT



IN ISA CONDITIONS, WHAT IS THE MAXIMUM THEORETICAL RANGE AT WHICH AN AIRCRAFT AT FL80 CAN EXPECT TO OBTAIN BEARINGS FROM A GROUND VDF FACILITY SITED 325 FT ABOVE MSL ?



IN ISA CONDITIONS, APPROXIMATELY WHAT IS THE MAXIMUM THEORETICAL RANGE AT WHICH AN AIRCRAFT AT FL210 MAY EXPECT TO RECEIVE SIGNALS FROM A VOR FACILITY SITED 340 FEET ABOVE MEAN SEA LEVEL ?



THE MAXIMUM THEORETICAL RANGE AT WHICH AN AIRCRAFT AT FL230 MAY RECEIVE SIGNALS FROM A VOR FACILITY SITED AT MEAN SEA LEVEL IS:



WHAT IS THE MAXIMUM THEORETICAL RANGE THAT AN AIRCRAFT AT FL150 CAN RECEIVE SIGNALS FROM A VOR SITUATED 609 FEET ABOVE MSL?



A DME STATION IS LOCATED 1000 FEET ABOVE MSL.
AN AIRCRAFT FLYING AT FL 370 IN ISA CONDITIONS WHICH IS 15 NM AWAY FROM THE DME STATION, WILL HAVE A DME READING OF:

[bolty_1000]

AN AIRCRAFT, AT FL 410 IS PASSING OVERHEAD A DME STATION AT MEAN SEA LEVEL. THE DME INDICATES APPROXIMATELY:

A/c is directly above the DME and measures slant range. Therefore 41,000 in nm = nm (1nm = 6080ish ft)



AN NDB IS ON A RELATIVE BEARING OF 316° FROM AN AIRCRAFT.
GIVEN:
COMPASS HEADING 270°
AT AIRCRAFT DEVIATION 2°W, VARIATION 30°
AT STATION VARIATION 28°E,
CALCULATE THE TRUE BEARING OF THE NDB FROM THE AIRCRAFT

You need to give us Variation as either East or West (+or-) for this Q. Best bet with these sorts is to draw them out!! NDB is on RB of 316° (44° degrees left of the nose). A/C is on a Compass heading of 270....therefore you need to apply the CDMVT mnemonic or simply Cadburys Dairy Milk Very Tasty (Compass-Deviation-Magnetic-Variation-True) to get your true heading.
From this you take away the 44° for your answer!


IN ISA CONDITIONS, WHAT IS THE MAXIMUM THEORETICAL RANGE AT WHICH AN AIRCRAFT AT FL80 CAN EXPECT TO OBTAIN BEARINGS FROM A GROUND VDF FACILITY SITED 325 FT ABOVE MSL ?

Use the formula:

SqRt of a/c height + SqRt of Facility height x 1.25
(89.4 + 18) x 1.25
=134nm

**SqRt=Square Root Of.... (sorry cant fint the key map on this computer)



IN ISA CONDITIONS, APPROXIMATELY WHAT IS THE MAXIMUM THEORETICAL RANGE AT WHICH AN AIRCRAFT AT FL210 MAY EXPECT TO RECEIVE SIGNALS FROM A VOR FACILITY SITED 340 FEET ABOVE MEAN SEA LEVEL ?

As before



THE MAXIMUM THEORETICAL RANGE AT WHICH AN AIRCRAFT AT FL230 MAY RECEIVE SIGNALS FROM A VOR FACILITY SITED AT MEAN SEA LEVEL IS:

As before but dont put anything in for the facility ans = 189nm



WHAT IS THE MAXIMUM THEORETICAL RANGE THAT AN AIRCRAFT AT FL150 CAN RECEIVE SIGNALS FROM A VOR SITUATED 609 FEET ABOVE MSL?

Again....as before



Hope this helps.......and I hope to god I got them right!!