This one
According to the doctrinal reverse-planning process for breaching operations, what is the initial starting point from which all subsequent actions and timelines are derived?
Actions on the OBJ by the assault force.
What is the doctrinal asset redundancy planning factor for an obstacle reduction operation?
50% equipment redundancy (2 reduction assets per required lane)
In minefield reduction planning, what is the primary reduction asset allocation rule when the obstacle depth is between 90 meters and 180 meters?
2x MICLICs fired in tandem/relay per lane (plus 50% redundancy = 4 total line charges per lane).
What constitutes a 'Complex Obstacle Lane' in combined arms breaching doctrine?
An obstacle integrating two or more distinct obstacle types (e.g., AT ditch + buried minefield + wire) defended by fires
During a covert, night-time dismounted breaching operation, which Weapons Control Status (WCS) should the commander enforce to prevent premature exposure of the force?
Weapons Hold
Under the SOSRA framework, what is the primary doctrinal purpose of the OBSCURE fundamental?
To blind enemy thermal and optical target acquisition across the Point of Breach
How many cleared breach lanes are doctrinally required to support a committed maneuver assault company?
Minimum 2 lanes per company (1 lane per maneuvering platoon)
When planning multiple parallel explosive breaching lanes, what is the minimum doctrinal lateral separation distance required between lanes to account for Surface Danger Zones (SDZ) and blast overpressure?
250 to 300 meters
Under NATO STANAG 2036 lane marking standards, what are the night visual colors specified for the left and right boundaries of a cleared breach lane?
Steady Green on the left, Steady Red or Amber on the right
A Support Force has established a 3:1 local suppression ratio over defending enemy infantry. The Assault Force has cleared the intermediate staging line and is passing through the entrance funnel of Lane Red 1. Which fire support coordination measure (FSCM) must be active to ensure overwatching support tanks do not strike the advancing assault vehicles?
Restrictive Fire Line (RFL)
What is the fundamental operational distinction between breaching operations and clearance operations?
Breaching is a synchronized combined arms operation under enemy fire; clearance is the methodical, total elimination of hazards in secured areas.
Which sequence correctly identifies the six fundamentals of the Assured Mobility framework?
Predict, Detect, Prevent, Avoid, Neutralize, Protect
What is the doctrinal footpath requirement and unit allocation for supporting a dismounted assault platoon through an antipersonnel minefield and wire obstacle?
1 footpath per assault platoon; allocated 1 Engineer or Infantry Squad to RPMR
What role do Engineer Regulating Points (ERPs) play during gap-crossing and complex breaching operations?
They control vehicular flow, verify vehicle spacing, and enforce march discipline along approach routes
Under which Weapons Control Status (WCS) are friendly forces authorized to fire at any target not positively identified as friendly?
Weapons Free
What are the minimum doctrinal lane width requirements for a standard one-way tracked/wheeled lane and a two-way cleared lane through an obstacle?
4.5 meters for one-way; 8.0 meters for two-way
During Phase II of a deliberate Gap-Crossing Operation, what is the primary objective of the assault force?
Assault across the gap to seize far-side footholds and eliminate enemy direct fire onto crossing sites
Under ATP 3-90.4 Appendix A, who is responsible for emplacing Initial (Hasty) Lane Marking, and what does it consist of?
Breach Force; minimal markers (entrance funnel, single handrail along one boundary, and exit marker)
In deliberate wet-gap crossing command structures, who is the officer responsible for tactical control, bridging assembly, rafting turnaround, and local protection at an individual crossing site?
Crossing Site Commander (CSC)
In designing engagement criteria for decentralized execution during an obstacle breach, what system must be placed at the absolute top of the Support Force's target prioritization stack?
Enemy observers (OPs), laser-designators, and ATGM systems threatening reduction platforms
What is the cleared lane footprint and primary munition limitation of an M58 Mine-Clearing Line Charge (MICLIC)?
100m x 8–14m; effective primarily against single-impulse pressure-fused AT mines
What are the maximum span and Military Load Class (MLC) capabilities of the M104 Wolverine Heavy Dry-Gap Bridge?
24–26 meters; MLC 80+
In the Engineer 'Blue Checkbook' methodology, how is a mobility shortfall determined?
When required reduction, proofing, and marking assets (including 50% redundancy) exceed on-hand mission-capable equipment
What is the mathematical formula used to calculate the required duration of multi-spectral smoke obscuration for an obstacle breach?
T_smoke=
T_reduction + T_assault flow + T_buffer
How should a commander transition the Weapons Control Status (WCS) across different phases of an attack?
By tying transitions to clearly identifiable geographic boundaries (Phase Lines) or tactical milestones, and broadcasting the change immediately.