HSI ------ "how to"

[SDsc0rch]

==INTRO==

 

 

 

just want to help ppl out who are flying online and want to share their position with others

 

the F-15C is fairly popular online, and its the platform i know best, so i'll share a little knowledge here for the benefit of the community (i hope!)

 

 

referencing your position with respect to bullseye is helpful when everybody is spread out across the map

 

good for us, it is also easy to do

 

 

 

 

 

in your F-15 cockpit is an HSI (horizontal situation indicator) - its right below the ADI (the "ball" that shows you where the horizon is)

 

there's a lot going on there, but i'm just going to focus on one aspect

 

 

first, cycle to waypoint "1" [[use L-CNTL ` and L-ALT ` to cycle up and down through your waypoints --- note: you might have to cycle nav modes first - press "1" (that is the number "one" - NOT on the keypad) until you can get the waypoint number to change (is that a bug??)

 

verify "1 NAV" appears in the lower right-hand corner of your HUD

 

your HUD and HSI will now be displaying information for nav point "1" ---- aka bullseye

 

[[note: the vast majority of the time - and especially if you spend any time at all on oh.. say...... the 104th server, wypt1 is bullseye]]

 

 

 

here's the HUD view with wypt 1 selected...

 

 

 

 

 

 

 

==YOUR NEW BEST FRIEND -- THE HSI==

 

 

now look down at the HSI

 

one of the "arrows" on the HSI points toward your currently selected waypoint

 

[see "circle 1" in the figure below]

 

this arrow indicates the direction TO nav point 1

 

but we want the bearing FROM waypoint 1 --- therefore, we look at the other side of that arrow - 180-deg away FROM waypoint 1

 

in this case... 300

 

[see "square 2" in the figure]

 

 

and the last thing to do is find your RANGE from bullseye/wypt1

 

you'll find that in the window in the upper left-hand corner of the HSI

 

[see "arrow 3"]

 

 

 

 

 

 

that's it!

 

 

 

 

 

==COMPARE==

 

 

lets compare this result with ownship position as displayed on the kneeboard

 

type RT-SHIFT K ------ this will pull up the kneeboard as seen in the figure below

 

then click RT-CTRL K ----- that marks your position on the map

 

[ see thin red circle on the kneepad for ownship position - its marked with a purple "V"]

 

 

 

now if you just eyeball it, you can see, our position is yeah.. roughly 300 / 30 miles from wypt1

 

[ see RED ARROW coming from wypt1/bullseye ]

 

 

 

 

 

 

so, if anybody asks where you are - now you can tell them!

 

and.. if you hear someone online saying they are northwest of bulls, 20 miles, you can either look at your own kneepad and see at a glance, or reference your own HSI, see where YOU are, then imagine where he is relative to you

 

 

 

yeahhhhh.. you could reference the F10 view, but (in the servers where its allowed!) it takes time, you've got to take your hand off your HOTAS, and mouse around.... taking time and taking your eyes off where you're going

 

if you're scampering around on the deck in the mountains hiding from bandit radars and you pull up F10 map view, you could very easily run into cumulo granitus, fly right through a star or bounce too close to a supernova...

 

"and that would end your trip real quick, wouldn't it, kid"

 

 

just checking to see if anybody's actually reading this ; )

 

 

 

 

but this is quick

 

and, it will have to do until we get a full-up DCS-level F-15C which will have a moving map display overlayed with datalink symbology - then all of this information will be instantly perceived in a simple glance

 

 

 

 

learn it, and prosper!!

 

 

any questions??

Edited March 6, 2015 by SDsc0rch

[rrohde]

Good stuff! Very useful information. Thank you! :)

[kobeshow]

Everyone should know this, so I believe this will come in handy for a lot of new players

[MrTUX]

Thanks for the info, but i don't get why the hsi shows 101 as course instead of 300 (the correct heading) .

 

i probably don't understand the basics of navigation, so don't get too mad:music_whistling:

[kontiuka]

Thanks for the info, but i don't get why the hsi shows 101 as course instead of 300 (the correct heading) .

 

i probably don't understand the basics of navigation, so don't get too mad:music_whistling:

300 is the bearing to the waypoint (compass direction relative to your aircraft). For the most direct route to the waypoint, you would make your heading (where your nose is pointing) equal to this bearing to point directly at the waypoint. However, this may not be the BEST route as it may, for example, put you in the path of enemy aircraft or SAMs or steer you into a tall mountain. This is why you want to follow the course and therefore intercept the 101 course line. Just to use an analogy, think of the course as a paved highway and anything off the course is just dirt roads. You can choose either one but which is the best route. ok, nevermind traffic and construction.;)

[OnlyforDCS]

Well done. Very succinctly explained. KUDOS :)

[DarkFire]

Very useful thanks.

 

+1 internets for the Star Wars reference :)

[Howler4]

Thanks for the explanation!! Now I can tell everyone where I got shot down at on the 104th :-/

[SDsc0rch]

Thanks for the info, but i don't get why the hsi shows 101 as course instead of 300 (the correct heading) .

 

i probably don't understand the basics of navigation, so don't get too mad:music_whistling:

 

 

let me explain whats going on here

 

 

 

when the mission designer was creating this mission and laying down the waypoints for our aircraft, lines were created between the waypoints - those lines have the following properties: direction and distance (also altitude - but lets ignore that for right now...)

 

"theoretically" you're going to fly along that course

 

 

but, what is the reality?? when you're out there on the server, NOBODY flies directly to wypt1 and then on to wypt2 and then back to homeplate

 

huh

 

 

 

the "101" that you see in the window on the upper right-hand corner of the HSI is telling you that the course laid down by the mission planner from wypt0 to wypt1 is 101-deg

 

 

 

but like i just said - almost NOBODY flies along the course lines created by the mission designer

 

so.. what's the truth? the TRUE bearing to the selected waypoint is the arrowhead in the HSI (see red circle with label "1" in the second screenshot ---- i know, it doesn't look like an actual "arrow" - it looks more like a doghouse huh --- and don't forget, we want our bearing FROM the waypoint, so we're not even looking at the "arrowhead/doghouse" - we're looking at the tail of that arrow)

 

 

 

 

at any rate, i hope that helps

Edited July 8, 2015 by SDsc0rch

[Wrecking Crew]

Ahh, so you are using a convention where the Bullseye is placed at Waypoint 1. Is there any marker on the Kneeboard for the Bullseye, itself, if it is located elsewhere? I can have a lot of flights in a mission, where each will have different paths.

 

WC

[feefifofum]

Hey Crew,

 

Unfortunately there is no way to get a bullseye reference in the F-15 without using a waypoint AFAIK.

 

I will usually either include passing it on the flight plan and making it known which steerpoint is bullseye in the briefing materials, or tack it on as WP1 so it can easily be brought up and referenced. If you don't want your flight plan to get janky you can add it to the end of your waypoints.

[SDsc0rch]

yeah.. the 104th missions tend to use wypt1 as B/E

 

if you're in a mission where A) B/E is a waypoint, and B) that waypoint is not #1, then as part of your preflight checks, make the appropriate adjustments

 

 

 

and no, there isn't a specific B/E icon in the kneeboard (as per the included screenshots)

 

that might actually be a decent suggestion/request to ask of ED

 

 

 

hmm

[Destroyer37]

http://www.faa.gov/regulations_policies/handbooks_manuals/aviation/pilot_handbook/media/PHAK%20-%20Chapter%2015.pdf

 

Start with page 15-24 should help a bit...

[MrTUX]

:thumbup:Thanks guys i'll study it

[Destroyer37]

Awesome let us know how it goes for you!

[Wrecking Crew]

that might actually be a decent suggestion/request to ask of ED

 

hmm

 

Done

 

http://forums.eagle.ru/showthread.php?p=2430508#post2430508

 

WC

[rcjonessnp175]

Done

 

http://forums.eagle.ru/showthread.php?p=2430508#post2430508

 

WC

 

 

Off topic but boy oh boy is point and shoot mission you have running past couple of days is a blast, by the way its Crom, again great mission! So much more fun having human minds controlling the ground forces on both sides.

[uboats]

So the wpt 1 is manually placed at the position where BE locates?

For those server in which no WPT is preset for A/C, in my understanding, above method will not be available?

[Home Fries]

One thing you can do as a mission designer is set one of your last waypoints to Bullseye, then cycle to your bullseye waypoint when you want to call bullseye. Since you can't place a "landing" waypoint at any waypoint other than the last waypoint, what you can do is set two waypoints near the return airfield, then put the bullseye waypoint inbetween them (so the course line looks way out of place). This will let the observant pilot know that this is the "throwaway" waypoint used for bullseye.

 

Personally, I would love to see a separate navigation mode (like nav/ilsn/rtn) called B/E that cycles the HSI to bullseye so you can get a quick reference. It may not be a realistic avionics mode, but it is a concession to gameplay that could be rationalized by being the equivalent of a pilot puting in B/E as an on-the-fly waypoint or another mode that isn't represented in the FC3 avionics package.

Edited July 10, 2015 by Home Fries

[Wrecking Crew]

THANK YOU, Crom!

 

I'm posting Pointe & Shoot on my Wrecking Crew Projects site today.

 

---

 

Thanks, HomeFries,

Good work-around.

 

WC