Nuclear reports and mapping

Formula for TCOMP

T comp = (TARR x 1.25) + (cloud diameter / wind speed)

Formula for TARR

TARR = Distance from GZ in km / Wind speed

CBRN Reports that are map overlays sent to a commander

CBRN 3 & CBRN 5

How do you find the persistency of radiological hazards?

Radiation dose rate mesaurements

Three lines required to send a CBRN 3 report

Delta, Foxtrot, Papa B

Rule 1 of TARR/TCOMP calculations

All times can be estimated ½ before OR after

Rule 2 of TARR / TCOMP Calculations

Your estimate is correct

Rule 3 of TARR/TCOMP Calculations

Estimated times can be 2x OR H+12 hours (whichever is earliest)

How do you calculated Zone 2 & H+2 Hours

Double Zone 1 + H+1 hours respectively

What point must you plot 1st when using a CBRN 3 report to create a map overlay?

Line Foxtrot: Location of attack

What line of a cbrn 3 report contains the information to draw the projected nuclear path?

PAPA B

What data points does line PAPA B contain? (WZCA)

Wind speed, zone 1 length, cloud radius, angles of predictive fallout pattern

What needs to go to the top right of every map created with a CBRN 3 report?

Gridline indicator to ID lat/long

The critical step once your cloud and zone 1 are plotted?

Tangent Lines

T COMP Acronym

Time of Radioactive Fallout Completion

The metric to determine field contamination

2 X (Background radiation level read by AN/VDR-2)

Types of radiation AN/VDR-2 detect

Beta & Gamma

What type of radiation is being measured if the cover is closed on the AN/VDR-2 probe?

Gamma

If Background radiation: 28uGy, and the AN/VDR-2 reads 28uGy closed, but 60uGy open. Is there a contamination?

Yes, the reading open is over 2x the background radiation. This is Beta contamination only

The order you plot fallout predictions from an NBC 3 report

See image

How will an H+1 & Zone 1 of the same length be plotted?

see image

5 types of battlefield contamination

B - Beta, Y - Gamma, BY - both, NC - No contamination, BG - Background

TARR

Time of arrival of winds

What scale are most maps for CBRN 3 reports?

1:100,000 scale

3 rules for once TARR/TCOMP calculations are created?

1. All times can be estimated to be 1/2x sooner or later (earliest)

2. Can arrive at estimated time

3. Can be 2x the estimated time or H+12 hours (whichever is earliest) - (latest arrival time)

4 Rules are factored into estimating (TDSW)

Time, Distance, Shielding, Wait

What watch can measure individual soldiers’ radiation levels?

DT236A Dosimeter watch

What is the max radiation the DT236A Dosimeter watch can absorb?

99 cGy max

Can you reset a DT236A dosimeter watch?

No

Does a DT236A dosimeter watch get returned to the unit when a soldier PCS?

No, it stays with the soldier throughout their career

What type of radiation does the DT236A dosimeter watch absorb?

Gamma

How do you measure radiation on a soldier with an AN/VDR-2? (4 steps)

See photo