[HT] [TS] Night Vision Devices - PNVGs and ANVIS - Page 2

General Lee · 06-11-2013, 01:15 PM

Hello everyone,

There is a question gnawing me lately. NVG's in Gurps provides a narrow field of view (~40º), colorblindness and -3 for lack of depth perception. Green Eyes (Tactical Shooting, p.38) negate some of this shortcomings. Moreover, if using the Aiming rule described in Tactical Shooting, one cannot make sighted or aimed shots using NVGs.

I was reading No Easy Day, that describes the Operation Neptune Spear (the killing of OBL), and notice the indication of the use of PNVGs (Panoramic NVGs) with field of view of ~97º, also seen in Zero Dark Hour film (NVGs with four tubes). According to the descriptions of this equipment, the operator have peripheral vision, without needing to maintain his head in a constant swivel (which realistically describes Green Eyes).

Googling it, I also found that PNVGs have an increased depth perception given that the humam brain process the images from two separate sources (each eye). IIRC, the -3 penalty comes from the lack of depth perception, as having the One Eye Disavantage.

So, using binocular NVGs, as PNVGs and ANVIS (Aviation NVGs), would negate or mitigate this shortcomings without need of Green Eyes?

For example, a pilot using an ANVIS would still have Colorblindness and No Peripheral Vision (FoV 40º), but would have no penalty or -1 for vision rolls, instead of -3.

An Operator using a PNVG would still have colorblindness, but retain Peripheral Vision and have no penalty, -1 (as above in ANVIS) or -2 (as Green Eyes).

The disavantages of using such devices are cost and weight.

What are your thoughts on this?

Thanks, in advance.

06-11-2013, 01:15 PM	#1
General Lee Join Date: Jan 2008 Location: Somewhere between Cape Horn and Zenith Point	[HT] [TS] Night Vision Devices - PNVGs and ANVIS Hello everyone, There is a question gnawing me lately. NVG's in Gurps provides a narrow field of view (~40º), colorblindness and -3 for lack of depth perception. Green Eyes (Tactical Shooting, p.38) negate some of this shortcomings. Moreover, if using the Aiming rule described in Tactical Shooting, one cannot make sighted or aimed shots using NVGs. I was reading No Easy Day, that describes the Operation Neptune Spear (the killing of OBL), and notice the indication of the use of PNVGs (Panoramic NVGs) with field of view of ~97º, also seen in Zero Dark Hour film (NVGs with four tubes). According to the descriptions of this equipment, the operator have peripheral vision, without needing to maintain his head in a constant swivel (which realistically describes Green Eyes). Googling it, I also found that PNVGs have an increased depth perception given that the humam brain process the images from two separate sources (each eye). IIRC, the -3 penalty comes from the lack of depth perception, as having the One Eye Disavantage. *So, using binocular NVGs, as PNVGs and ANVIS (Aviation NVGs), would negate or mitigate this shortcomings without need of Green Eyes?* For example, a pilot using an ANVIS would still have Colorblindness and No Peripheral Vision (FoV 40º), but would have no penalty or -1 for vision rolls, instead of -3. An Operator using a PNVG would still have colorblindness, but retain Peripheral Vision and have no penalty, -1 (as above in ANVIS) or -2 (as Green Eyes). The disavantages of using such devices are cost and weight. What are your thoughts on this? Thanks, in advance. Last edited by General Lee; 06-12-2013 at 01:19 PM.