4. DEIRS

4.1 A deir⁷ is a terrain feature of any overlay (12.) whose ID is prefixed by a "D", and is represented by a yellowish area enclosed by golden yellow shading (this shading being known as the Lip).

4.2 A deir, including its Lip hexes (i.e., those hexes on the overlay that contain a Lip), is a slight concavity. Units in a deir are at level 0 (assuming the overlay is on level 0 terrain), but can receive certain protective benefits due to the deir's Lip. Each hexside that forms part of a Lip hex, while lying completely "outside" the Lip, is termed a Lip Hexside. All deir hexes are Open Ground (1.1) [EXC: if deir TEM applies; 4.5] except as altered by the presence of scrub (2.2) or sand (7.2).

4.3 MF/MP: A unit (regardless of type) pays no extra MF/MP cost for entering/traversing a deir Location other than the COT of the hex (which is usually Open Ground). [EXC: A vehicle that exits a deir hex via a Lip Hexside must expend one extra MP to cross that hexside. For Defensive Fire purposes, this MP is assumed to be expended in the hex entered.]

4.4 LOS: A deir's only effect on LOS is that, barring other LOS obstructions, an entrenched/Emplaced unit in a non-Lip deir hex has a LOS past a Lip Hexside only to a same-level hex formed by that Lip hexside, and to any hex at a higher elevation than that entrenched/Emplaced unit. See also 4.51.

4.5 TEM: A non-PRC target in a deir receives a + 1 TEM (or may claim HD status) vs Direct Fire if the firer is at the same elevation as the target and that firer's LOF crosses a Lip Hexside that does not form part of that firer's hex [EXC: if the firer and target are in separate deirs, and the firer is ADJACENT to the target across a Lip Hexside, that target still receives the deir's protective benefit]. Otherwise, a deir gives no protective benefit and is treated as flat level ground [EXC: Fire Lane; 4.52].

4.51 AFV/WRECK TEM & HINDRANCE: An AFV/wreck in a deir can provide a + 1 TEM in the normal manner. Likewise, a LOS Hindrance in a deir can affect LOS in the normal manner [EXC: a "half-level" Hindrance in a deir can affect LOS only if both the viewing and viewed units are at the same level and at least one of those units is in any deir; for deir LOS purposes, brush, bridge, grain, marsh, crag, and an AFV/wreck (in LOS as per D9.4) are defined as "half-level" Hindrances].

4.52 FIRE LANE: Infantry/Horses moving in a deir hex are immune to a Fire Lane attack in that hex if that Fire Lane crosses a Lip Hexside before/as it enters that hex and that hex does not contain the Fire Lane counter. A vehicle/Vulnerable PRC [EXC: Cavalry Personnel] moving in a deir hex is immune to a Fire Lane attack in that hex if a Wreck in that hex would not Hinder that LOF (see 4.51) and that hex does not contain the Fire Lane counter.

EX: Shown in the Illustration are a deir (with its Lip Hexsides shown by the dashed line) and a hillock (6.). Below are listed the LOS and protective benefits of the various units shown. Note that all units in the illustration are in mutual LOS unless specifically mentioned otherwise. Similarly, + 1 TEM/HD status (which cannot apply to mortar/OBA fire) is given only where applicable; units not mentioned are not eligible for such status. Not all AFV LOS Hindrances are listed, but a representative sample is given.

• Tank A is HD only to squads H and I. Tank A Hinders squad H's LOS to squads K and L, but does not Hinder squad G's LOS at all. Tank A Hinders squad F's LOS to tank D but not to squad E.
• Tank B is HD only to tank D and squads H and I. Tank B Hinders Tank C's. LOS to all other units shown except for squads F, G and L.
• Tank C is HD only to tank D and squads E, H and I. Tank C Hinders tank A's and tank B's (but not squad F's) LOS to hex P9 and also Hinders tank B's and tank D's (but not squad E's) LOS to hex R9.
• Tank D is HD only to tanks B and C and squads H, I and M. Tank D Hinders squad E's LOS to tanks B and C and to squads L and M but not to hexes P7-P9 or R9-S10.
• Only entrenched squad J lacks LOS to squads H and I.
• Squad K receives a + 1 deir TEM (vs Direct Fire) only if fired on by squad(s) H/I (4.5), and a + 1 Hindrance DRM vs. their fire due to tank A.
• Squad M receives a + 1 TEM due to tank C if fired on by any unit (considering them to be British for the moment) other than tank C (4.51; but this TEM is not cumulative with any deir TEM). If tank C were not in the hex squad M would still receive a + 1 deir TEM vs Direct Fire from squads H/I or E as well as from tank D (were it British).
• The FP of a Fire Lane counter placed in S10 by squad E would not affect moving squads K, J or L, nor would it affect any Vulnerable PRC of moving tanks B or D. However if squad E placed the Fire Lane counter in R8 moving squad L could be attacked by 4 it, as could the Vulnerable PRC of moving tanks B and D. Only in the latter placement of the Fire Lane counter could tanks B and D possibly Hinder the Fire Lane.