Posted on Jul 14, 2020
PO2 Equipment Operator
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My naval reserve contract is up soon and one MOS I saw was 13F an old war dog said I have to be good at math how true is that? And is there anything else I should know? I’m also an an E5 what billet would I be filling?
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Responses: 3
CSM Darieus ZaGara
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13F is far from the water. We have lite and heavy. Lite, ruck sack and hike most places. Heavy means you ride in an armored vehicle, occasionally rucking. Yes math is a. Requirement, it is the requirement as you are guiding munitions from mortars to fixed wing weaponry in on a target and it must be precise, the observers life and the life of innocent civilians and Soldiers is in jeopardy.
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PO2 Equipment Operator
PO2 (Join to see)
11 mo
Can you into detail about the math behind the mos?
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SSG Eric Blue
SSG Eric Blue
11 mo
PO2 (Join to see) - CSM ZaGara said what you needed to know, generally. Far as the math goes, you need to be able to convert degrees to mils and figure out distance quickly in the case of exploding rounds and eye-balling stuff. Don't worry...they'll teach you in the schoolhouse, but the learning curve for NCOs would be steep and they'd expect you to know your stuff immediately when you get to your unit. That's basic stuff. It gets more involved that what CSM ZaGara and I said.
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CSM Darieus ZaGara
CSM Darieus ZaGara
11 mo
You should first be concerned with the asvab, there is a minimum overall and a minimum math score required for 13F. The math involves Geometry, and a bit of calculus. While there is modern technology involved, you have to be prepared to do it “manual” if the tech fails. In addition, an NCO in the world of FIST is a pretty staunch and required to know a lot about many things. Infantry tactics for one. You will hit the ground running and never slow down. My only concern for you is not the math, rather the stak difference in services jumping off as an NCO.

This is not to say that you cannot accomplish this, it is to say, do not take it lightly.
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SGT Justin Brothen
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Math is needed yes, until you can "scope" a moving target and it's interception point. As a Sgt your going to be tested ALOT by the SPC in the field who will know far more then you in the job. Read up man, get to know those 15 subs and 6 elements of fire. Get with a Sgt fister, learn about FPF lines, and fuses.
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SGT Justin Brothen
SGT Justin Brothen
11 mo
Repost your question into the fister page, lots of very knowledgeable people there as well.
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SGT Kenneth Curtis
SGT Kenneth Curtis
11 mo
PO2 (Join to see) plus brush up on land navigation and use of the lensatic compass. Once you get your cross cannons you’re no longer authorized to get lost.
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SGT Justin Brothen
SGT Justin Brothen
11 mo
SGT Kenneth Curtis good points there Sgt
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CPL John C. Lynch
CPL John C. Lynch
11 mo
Math will be basic, more complex for 13E who takes our information and actually calculates it for the Bravos. But as CSM ZaGara stated, FIST Teams are attached to Infantry Units (and just about anyone else who went out to the field). You will not only need to know your job, but be prepared to handle many others. If you love being in the field, it is a great MOS for that
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CPL Jarod Depastene
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Oh, 13F is the best MOS in the Army. But, I'm biased.
If you want to be a gunslinger, this is the best way to do it.
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