Iron Nest Mission 8: Rock of Gibraltar - Solutions

Worked example: Bearing, range, charge and elevation figures below come from a sample playthrough. Enemy spawns and your Iron Nest’s position vary each run — always measure on the map and follow the in-game ballistic calculator.

Mission Critical Strategy: The Silence Gate

Rock of Gibraltar combines two mechanics that each punish impatience, and it enforces them with the harshest failure condition in the campaign so far.

The first is spatial. Rockingham does not arrive as a grid reference. The briefing delivers it as a chain of relative offsets from two landmarks on the waterfront, which means the target’s position has to be derived rather than read. You walk the chain: Iron Nest to The Mole, The Mole to the Dockmaster’s House, the Dockmaster’s House to Rockingham. Only at the end of that walk does a firing vector exist.

The second is temporal. Enemy coastal radar stations are listening, and the mission opens with a hard radio silence and cease-fire until 11:08. Any transmission, and above all any shot, before that timestamp alerts the radar net, scrambles interceptors, and ends the mission instantly. There is no warning shot and no partial credit — the gate is absolute.

The result is a mission where the correct behaviour is almost entirely passive until the last possible moment: all the thinking happens silently on the map, and then a very short window opens in which everything must already be ready.

Chain fidelity: errors compound, they do not average out

A chained solution behaves differently from a single measurement, and this is the part that catches operators out. Each leg begins exactly where the previous leg ended. If your Leg 2 offset is drawn slightly off, Leg 3 inherits that error and then adds its own — the errors stack in the same direction rather than cancelling.

That has a practical consequence for how you plot. Draw each leg as a fresh, deliberate action: complete Leg 1 and mark The Mole; start Leg 2 from that mark, not from a re-identified version of the landmark; complete Leg 2 and mark the Dockmaster’s House; then start Leg 3 from that mark. Re-identifying a landmark mid-chain is where most catastrophic errors enter, because two slightly different readings of “the Dockmaster’s House” produce two different final positions.

Sanity check: the resultant direct vector comes out at 232.4°, which lands within about eight degrees of the outbound Leg 1 bearing of 240.0°. That is expected — The Mole and Rockingham sit on the same harbour axis, so the shot back down the chain should be nearly reciprocal to the way you came in. If your chain produces a bearing far away from that neighbourhood, you have misapplied an offset, and the correct response is to re-plot rather than to fire.

CHAINED VECTOR NAVIGATION: SECTOR HOTEL-08 (ROCK OF GIBRALTAR)

RADIO SILENCE UNTIL 11:08

Pre-Calculated Firing Solutions

The navigation chain

Leg	From	To	Bearing	Distance
Leg 1	Iron Nest	The Mole	240.0°	8.0 km
Leg 2	The Mole	Dockmaster’s House	035°	2.4 km
Leg 3	Dockmaster’s House	Rockingham (South)	180°	1.1 km

The resulting turret solution

Target Name	Turret Bearing	Target Range	Powder Charges	Elevation (θ)	Ammunition	Timing Gate
Rockingham Garrison	232.4°	9.20 km	2 Charges	46.00°	AP (Armor-Piercing)	Fire between 11:08:30 and 11:09:15

Step-by-Step Operator Routine

Phase 1: Chain Plotting Before the Gate (Radio Silence — Timer: 11:08 Gate)

1. Read the briefing and note the two landmarks and the three offsets. Do not attempt to shortcut the chain.
2. Draw Leg 1: from Iron Nest, bearing 240.0°, length 8.0 km. Mark The Mole.
3. Draw Leg 2: starting from that mark, bearing 035°, length 2.4 km. Mark the Dockmaster’s House.
4. Draw Leg 3: starting from that mark, bearing 180° (due south), length 1.1 km. Mark Rockingham.
5. Draw the resultant vector from Iron Nest to Rockingham and read it back: 232.4° at 9.20 km.
6. Apply the sanity check — the resultant should sit in roughly the same neighbourhood as the outbound Leg 1 bearing, not on the far side of the map.
7. If — and only if — the chain leaves genuine ambiguity about which structure is Rockingham, request a Forward Observer now, while still inside the silence window. Otherwise skip it entirely; the default is silence.

Phase 2: Gun Preparation Under Silence (Timer: 11:08 Gate)

1. At 9.20 km the shot is short and comparatively flat. Load 2 Powder Charges.
2. Set elevation to 46.00°. Both the short range and the reduced charge count are what allow the round to arrive fast and flat.
3. Retrieve 1 AP (Armor-Piercing) shell. H would break the structure open; AP is what the garrison itself requires.
4. Load the shell and the 2 charge bags, then close and lock the breech.
5. Traverse the turret to 232.4° and verify against the bearing indicator.
6. Confirm bearing, elevation and charge count one final time. Do not fire. The gate has not opened.

Phase 3: The Firing Window (11:08:30 → 11:09:15)

1. Watch the clock. The permitted window is narrow — roughly 45 seconds wide, opening half a minute after the silence lifts.
2. Inside that window, traverse to 232.4° if you drifted, confirm elevation 46.00°, and pull the lanyard.
3. Confirm the strike on Rockingham.
4. Resist the urge to fire a second round for reassurance unless the first is visibly off. The window exists precisely because a second unplanned shot is the thing that risks exposure.

Phase 4: Confirm and Withdraw (Timer: Suspended)

1. Confirm the garrison is neutralized and the primary objective registers as complete.
2. Stand the gun down. Keep to silence discipline until the mission formally closes — the gate applied to the approach, and breaking it on the way out is an avoidable mistake.
3. Log the chain you used. Three legs and a resultant is the longest positional derivation in the campaign, and the same technique is what makes later concealed targets solvable at all.

[!IMPORTANT] Operator Rule: In Rock of Gibraltar, never treat the earliest permitted moment as the right moment. Silence until 11:08 is not a suggestion — it is the mission’s only real hazard. Plot the whole chain while you are still allowed to think, have the gun sitting on 232.4° at 46.00° well before the clock allows you to shoot, and then fire inside the window without improvising.