Link traverse M2 to M8 bearings

Deflection angles: $+$ = right, $-$ = left. A leg's bearing is the previous leg's bearing plus the deflection angle at the station between them.

Step 1: Bearings from the observed deflection angles

Computed bearing of M8-M9 = 35°, observed = 36°.

Step 2: Check of accuracy

$$\text{Misclosure} = 36^\circ - 35^\circ = +1^\circ$$

Permissible misclosure $= L.C. \times \sqrt{n} = 1^\circ \times \sqrt{4} = 2^\circ$ (n = 4 deflection angles). Since $1^\circ < 2^\circ$, the work is acceptable, but the bearings of the link legs are adjusted.

Step 3: Correction

Correction per angle $= +1^\circ/4 = +0.25^\circ = +0°15′$. The correction to a leg increases by 15′ at each station.

Corrected deflection angles: M2: −69°45′ (left), A: +20°15′ (right), B: −89°45′ (left), M8: +70°15′ (right).

Answer: bearings of the link legs M2-A = 35°, A-B = 55°, B-M8 = 325°; misclosure = +1° (within permissible 2°); corrected bearings M2-A = 35°15′, A-B = 55°30′, B-M8 = 325°45′.