TBS Phase 3 Exam | Complete Practice Questions, Correct
Answers & Detailed Rationales (2026/2027)
Question 1
What does the acronym TTLODAC stand for in fire support planning?
• A. Target, Trigger, Location, Observer, Delivery System, Attack
Guidance, Communications Net
• B. Tactical Target Line, Range, Observation, Direction,
Ammunition, Communication
• C. Target, Time, Location, Ordnance, Delivery, Artillery,
Coordination
• D. Transmission, Trigger, Line of Sight, Observation, Deployment,
Attack, Control
Correct Answer: A. Target, Trigger, Location, Observer, Delivery System,
Attack Guidance, Communications Net
Detailed Rationale: TTLODAC is the standard Marine Corps planning
format used to record and execute fire support targets systematically
across all echelons.
Question 2
Which fire support coordination measure (FSCM) is classified as a
permissive measure?
• A. Restrictive Fire Area (RFA)
• B. No Fire Area (NFA)
, • C. Fire Support Coordination Line (FSCL)
• D. Restrictive Fire Line (RFL)
Correct Answer: C. Fire Support Coordination Line (FSCL)
Detailed Rationale: Permissive measures facilitate the rapid
engagement of targets, and the FSCL is a primary permissive FSCM used
to coordinate attacks against surface targets beyond supporting
echelons.
Question 3
What is the primary purpose of a Restrictive Fire Area (RFA)?
• A. To allow unrestricted bombing by fixed-wing aircraft
• B. To regulate fires into an area according to specific coordination
requirements to protect friendly units or structures
• C. To establish a zone where no artillery or mortar rounds can ever
be fired under any circumstance
• D. To mark the boundary between adjacent battalion sectors
Correct Answer: B. To regulate fires into an area according to specific
coordination requirements to protect friendly units or structures
Detailed Rationale: An RFA is a restrictive control measure established
to safeguard specific features, civilian installations, or friendly troops
from unintended engagement effects.
Question 4
What is the definition of a "No Fire Area" (NFA)?
, • A. An area into which no fires or effects of fires are allowed,
except upon specific higher headquarters approval or in self-
defense
• B. A zone reserved exclusively for artillery battery displacement
• C. A sector where only smoke and illumination rounds may be
fired
• D. An imaginary line separating battalion frontlines from brigade
reserves
Correct Answer: A. An area into which no fires or effects of fires are
allowed, except upon specific higher headquarters approval or in self-
defense
Detailed Rationale: An NFA strictly prohibits all incoming ordnance to
protect sensitive cultural sites, civilian populations, or friendly
command centers unless explicitly waived.
Question 5
What does the acronym SOSRA stand for in combat engineering and
breaching operations?
• A. Suppress, Obscure, Secure, Reduce, Assault
• B. Screen, Observe, Suppress, Retain, Attack
• C. Survey, Overcome, Secure, Reconnoiter, Advance
• D. Suppress, Organize, Scale, Reinforce, Ambush
Correct Answer: A. Suppress, Obscure, Secure, Reduce, Assault
, Detailed Rationale: SOSRA is the foundational tactical methodology
used by breaching forces to successfully penetrate enemy obstacle belts
under fire.
Question 6
Which of the four battlefield functions of engineering is focused on
altering terrain to protect personnel, equipment, and supplies from
enemy weapon effects?
• A. Mobility
• B. Countermobility
• C. Survivability
• D. General Engineering
Correct Answer: C. Survivability
Detailed Rationale: Survivability engineering involves constructing
fighting holes, bunkers, revetments, and overhead cover to shield
Marines from direct and indirect fire.
Question 7
What is the primary tactical objective of countermobility engineering
operations?
• A. To clear minefields and bridge blown-up river gaps
• B. To delay, channel, or disrupt the enemy's advance and reinforce
the effectiveness of friendly weapon systems
• C. To construct supply roads and helicopter landing zones in rear
areas
Answers & Detailed Rationales (2026/2027)
Question 1
What does the acronym TTLODAC stand for in fire support planning?
• A. Target, Trigger, Location, Observer, Delivery System, Attack
Guidance, Communications Net
• B. Tactical Target Line, Range, Observation, Direction,
Ammunition, Communication
• C. Target, Time, Location, Ordnance, Delivery, Artillery,
Coordination
• D. Transmission, Trigger, Line of Sight, Observation, Deployment,
Attack, Control
Correct Answer: A. Target, Trigger, Location, Observer, Delivery System,
Attack Guidance, Communications Net
Detailed Rationale: TTLODAC is the standard Marine Corps planning
format used to record and execute fire support targets systematically
across all echelons.
Question 2
Which fire support coordination measure (FSCM) is classified as a
permissive measure?
• A. Restrictive Fire Area (RFA)
• B. No Fire Area (NFA)
, • C. Fire Support Coordination Line (FSCL)
• D. Restrictive Fire Line (RFL)
Correct Answer: C. Fire Support Coordination Line (FSCL)
Detailed Rationale: Permissive measures facilitate the rapid
engagement of targets, and the FSCL is a primary permissive FSCM used
to coordinate attacks against surface targets beyond supporting
echelons.
Question 3
What is the primary purpose of a Restrictive Fire Area (RFA)?
• A. To allow unrestricted bombing by fixed-wing aircraft
• B. To regulate fires into an area according to specific coordination
requirements to protect friendly units or structures
• C. To establish a zone where no artillery or mortar rounds can ever
be fired under any circumstance
• D. To mark the boundary between adjacent battalion sectors
Correct Answer: B. To regulate fires into an area according to specific
coordination requirements to protect friendly units or structures
Detailed Rationale: An RFA is a restrictive control measure established
to safeguard specific features, civilian installations, or friendly troops
from unintended engagement effects.
Question 4
What is the definition of a "No Fire Area" (NFA)?
, • A. An area into which no fires or effects of fires are allowed,
except upon specific higher headquarters approval or in self-
defense
• B. A zone reserved exclusively for artillery battery displacement
• C. A sector where only smoke and illumination rounds may be
fired
• D. An imaginary line separating battalion frontlines from brigade
reserves
Correct Answer: A. An area into which no fires or effects of fires are
allowed, except upon specific higher headquarters approval or in self-
defense
Detailed Rationale: An NFA strictly prohibits all incoming ordnance to
protect sensitive cultural sites, civilian populations, or friendly
command centers unless explicitly waived.
Question 5
What does the acronym SOSRA stand for in combat engineering and
breaching operations?
• A. Suppress, Obscure, Secure, Reduce, Assault
• B. Screen, Observe, Suppress, Retain, Attack
• C. Survey, Overcome, Secure, Reconnoiter, Advance
• D. Suppress, Organize, Scale, Reinforce, Ambush
Correct Answer: A. Suppress, Obscure, Secure, Reduce, Assault
, Detailed Rationale: SOSRA is the foundational tactical methodology
used by breaching forces to successfully penetrate enemy obstacle belts
under fire.
Question 6
Which of the four battlefield functions of engineering is focused on
altering terrain to protect personnel, equipment, and supplies from
enemy weapon effects?
• A. Mobility
• B. Countermobility
• C. Survivability
• D. General Engineering
Correct Answer: C. Survivability
Detailed Rationale: Survivability engineering involves constructing
fighting holes, bunkers, revetments, and overhead cover to shield
Marines from direct and indirect fire.
Question 7
What is the primary tactical objective of countermobility engineering
operations?
• A. To clear minefields and bridge blown-up river gaps
• B. To delay, channel, or disrupt the enemy's advance and reinforce
the effectiveness of friendly weapon systems
• C. To construct supply roads and helicopter landing zones in rear
areas
