August 1942, English Channel off Sherborg.

Darkness at 0200 hours.

Six British motor torpedo boats approached German coastal convoy.

Torpedoes armed.

Attack run prepared.

Then search lights blazed across water.

German eboats fast attack craft armed with 20 mm cannons and machine guns closed at 40 knots.

MTBs carried torpedoes but minimal defensive armament.

Single vicar’s machine gun perboat against eboat firepower.

MTBs were helpless.

Torpedo attack aborted.

British boats withdrew under fire.

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Three MTBs damaged.

Mission failed.

This scenario repeated nightly.

Eboats dominated channel waters.

German escort vessels protected convoys effectively.

British torpedo boats could not press attacks.

They lacked firepower to fight through escort screen.

The Admiral T needed solution.

Build boats specifically for combat.

Sacrifice torpedoes for heavy guns.

Create vessels that could engage Eboats directly.

Let MTBs focus on torpedo attacks while gunboats fought escorts.

Naval architects said this violated doctrine.

Torpedo boats should carry torpedoes.

Gunboats would be too heavy for high speed.

Critics claimed the design was wasteful.

Build boats without torpedoes.

The Admiral T app approved it anyway.

Motor gunboats, MGBs, emerged.

Specialized vessels beat allpurpose designs.

British coastal forces doctrine validated.

The MGBs proved it.

By 1941, German eboats controlled channel approaches.

These vessels designated S boots by Marine represented excellent naval engineering.

90 to 100 ft length, 100 tons displacement, 40 knot maximum speed.

Diesel engines for extended range, wooden hull construction with rounded shape for superior seaeping.

Armament included two 20 mm automatic cannons, multiple machine guns, and two 21in torpedo tubes.

Range 400 nautical miles at 30 knots.

Crew 25 officers and ratings.

Eboats operated in coordinated groups, 3 to six vessels per flatilla.

Tactics emphasized speed and firepower.

German boats attacked British coastal convoys at night.

Torpedoes sank merchant vessels.

Guns engaged escorts.

High speed allowed rapid withdrawal before heavy forces arrived.

British destroyers were too slow to catch Eboats.

Coastal patrol craft lacked speed to intercept.

Motor torpedo boats could match Eboat speed but could not fight them.

British MTBs faced impossible tactical situation.

These boats carried torpedoes for attacking German convoys and warships.

70 ft length, 20 tons displacement, 40 knots speed from packard petrol engines.

Armament was minimal, single vicar’s machine gun, maybe two guns on later boats.

Torpedoes occupied all available deck space and weight allocation.

When eboats appeared, MTBs had two choices.

abort attack and withdraw or press torpedo attack while accepting eboat gunfire without ability to return effective fire.

The problem extended beyond combat effectiveness.

MTB crews faced heavy casualties when engaging armed escorts.

Ebo 20 mm cannons outranged Vicar’s machine guns.

German fire started at 1,000 yd.

British guns effective only inside 400 yd.

By time MTBs closed to firing range, eboats had already inflicted damage.

Plywood holes offered no protection.

20 mm shells penetrated completely.

Boats burned easily.

Petrol engines meant fuel fires.

Many MTBs lost before firing single torpedo.

Strategic situation demanded solution.

British needed to attack German coastal convoys.

These convoys supplied Vermacked units along French coast.

Disrupting supply lines would weaken German defenses.

But eboat escort made attacks costly.

Conventional doctrine said build more MTBs, accept losses.

The Admiral T chose different approach.

Build specialized gunboats.

Let them fight eboats.

Free MTBs to attack merchant targets.

Initial design requirements called for maximum arament on smallest practical hull.

Speed to match eboats.

Range 120 nautical miles to reach German convoy routes from British bases.

Crew accommodation minimal.

Weapons maximum.

Everything sacrificed for guns and speed.

No torpedoes.

No anti-ubmarine weapons.

Pure surface combat vessel.

Fair mile cype MGB emerged as first production variant.

110 ft length.

35 tons displacement.

Hard chine plywood hull.

Three whole scot petrol engines initially later standardized on other power plants.

Maximum speed 27 knots.

Range 120 miles at 20 knots.

Crew 12 officers and ratings.

Armament centered on automatic weapons.

Primary armament was two two pounder pom pom automatic cannons, one forward mounting, one aft mounting.

These weapons fired 40 mm shells at 100 rounds per minute cyclic rate.

Effective range 2,000 yd against surface targets.

High explosive shells could penetrate ebo holes.

Tracer rounds enabled night firing.

The pom poms gave MGBs firepower advantage over eboats at medium range.

Secondary armorament included multiple 20 mm oron cannons, two to four guns depending on configuration.

These weapons covered different arcs, port and starboard broadsides, forward and aft sectors.

Rate of fire, 450 rounds per minute.

Effective range, 1,000 yd.

Combined with PMP poms, MGBs could generate devastating firepower across all bearings.

Close-range defense use machine guns.

Multiple mounts in various configurations.

These weapons engaged at 400 yd and closer, useful for suppressing eboat crews during close engagement.

also effective against German coastal artillery when operating in shore.

Fairmile DT type represented heavier evolution.

115 ft length, 90 tons displacement.

Wooden hull with hard China construction but stronger framing than C type.

Four packard engines driving four shafts.

Maximum speed 30 knots.

Range 400 m at 20 knots.

Crew varied from 15 to 30 depending on roll and armament fit.

Some Dtypes served as MTBs with torpedo tubes.

Others configured as pure MGBs.

MGB variant DT type mounted six pounder gun forward.

This weapon fired 57 mm shells.

Effective range 4,000 yd, shell weight 6 lb.

Penetration capability against eboat hulls was excellent.

Single hit could disable engine room.

The six pounder gave DTY MGB’s standoff capability.

Engage EOS beyond their effective range.

force German boats to close or withdraw.

Secondary armorament remained similar to sea type two pounder pom poms.

Multiple 20 mm ericons.

Machine guns for close work.

Total firepower exceeded any ebo, but speed penalty was significant.

30 knots versus eboat 40 plus knots.

Dtype MGBs could not catch fleeing eboats.

They relied on ambush or coordinated operations with faster vessels.

British powerboat company BPB built lighter MGBs, 71 ft length, 22 tons displacement, three packed engines, maximum speed 40 knots.

These boats emphasized speed over firepower.

Armament was 2 pounder pom pom forward, twin 20 mm ericon aft and machine guns.

BPB MGBs served as fast scouts and pursuit boats.

They operated with heavier fair miles.

BPB boats made initial contact.

Fairmiles delivered heavy firepower.

Construction methods varied by type.

Fairmile boats used plywood over wooden frames.

Double diagonal planking provided strength.

Plywood kept weight low, but plywood was vulnerable to gunfire.

20 mm shells penetrated easily.

Crews relied on speed and maneuver rather than protection.

Some Dtype boats used mahogany planking, heavier, but more resistant to shell splinters.

Speed reduction was priced for better survivability.

Propulsion used Packard engines almost universally.

Packard supercharged marine engines.

12cylinder design supercharged for high output.

Each engine produced 1,00 to 1,500 the horsepower.

Fuel consumption was extreme 100 gall at full speed.

Operational endurance limited.

This restricted MGBs to operations within 60 mi of base.

Engines were temperamental.

Superchargers failed frequently.

Cooling systems leaked.

Spark plugs fouled.

Mechanical reliability was poor compared to German diesel engines.

Eboats operated for 8 hours at combat speed.

MGBs managed shorter endurance before fuel exhaustion.

British boats needed bases closer to combat areas.

Coastal ports from Dover to Portsmouth served as forward bases.

MGB flotillas rotated through these stations.

Tactical doctrine evolved through combat experience.

Early operations used MGBs independently.

Results were mixed.

Single MGB versus multiple EOS meant British boat was outnumbered.

Germans used numerical advantage effectively.

Surrounded isolated MGBs engaged from multiple bearings.

British boats had excellent firepower but could not cover all sectors simultaneously.

Revised doctrine emphasized coordination.

MGB flatillas operated with MTB flatillas.

Combined force approached German convoy.

MGBs engaged escort Eboats, drew their fire, occupied their attention.

MTBs used this distraction to attack merchant vessels with torpedoes.

After torpedo launch, MTBs withdrew.

MGBs provided covering fire during withdrawal.

This division of labor proved effective.

MGBs fought what they were built to fight.

MTBs attacked targets they were designed to attack.

Formation tactics used line of breast approach.

Four MGBs in line.

500 yd spacing.

This formation concentrated firepower while allowing maneuver space.

When Eboats appeared, formation turned to present broadsides.

All weapons engaged.

Pom poms fired at medium range.

Erlicons fired at close range.

Machine guns suppressed enemy crews.

Volume of fire was overwhelming.

Eboats faced wall of shells and bullets.

German boats withdrew or pressed attack into this firepower.

Night combat was standard.

Channel operations occurred in darkness.

Navigation was by dead reckoning and coastal features.

No radar early in war.

Later boats received primitive surface search sets.

Visibility often under 1,000 yard.

Contact ranges dropped to hundreds of yards.

Sometimes boats collided.

Other times they passed within 50 yards without seeing each other.

Muzzle flash became aiming point.

Crews fired at enemy gunfire signatures.

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July 1943, English Channel Britney Coast.

MGB flotilla from Dartmouth intercepted German convoy.

Six merchant vessels.

Four eboat escorts.

Eight British boats participated.

Four MGBs fairmile sea type and BPB boats.

Four MTBs.

Attack plan was coordinated.

MGBs engaged Eboats at 0130 hours.

Range 800 yd.

Pom poms opened fire.

Tracer rounds illuminated targets.

Eboats returned fire.

20 mm shells hit British boats.

Plywood holes splintered.

One MGB caught fire.

Crew abandoned ship.

Remaining MGBs pressed attack.

Closed range to 400 yd.

Ericons engaged.

Rate of fire from three MGBs exceeded 1,000 rounds per minute combined.

Eboats turned away.

Attempted withdrawal, but MTBs launched torpedoes during distraction.

Two merchant ships hit.

Both sank within 15 minutes.

British force withdrew before German reinforcements arrived.

One MGB lost, two damaged, but convoy mission succeeded.

The tactical doctrine worked exactly as planned.

Channel operations 1942 to 1944 saw nightly engagements.

MGB flotillas patrolled designated sectors.

German convoys operated on predictable schedules.

British intelligence tracked convoy movements.

MGBs positioned for intercept.

Combat occurred in Dova Strait of Sherborg near Channel Islands along Britany coast.

Actions were brief.

High-speed engagements lasting 10 to 20 minutes.

Casualties occurred on both sides.

Close-range combat at 40 knots in darkness tested crew nerves.

Boats maneuvered violently.

Engines roared.

Gunfire deafened crews.

Tracer created confusion.

Identifying friend from enemy was difficult.

Some engagements saw British boats firing on each other.

Other actions saw Eboats and MGBs pass within 20 yards without engaging due to recognition failure.

The chaos was extreme.

Eboat capabilities were formidable.

German boats had superior seaeping.

Rounded hulls handled rough seas better than British hardshine designs.

Eboats operated in conditions that grounded MGBs.

Diesel engines were more reliable than British petrol engines.

Range advantage was significant.

Eboats refueled less frequently for equivalent operations.

German construction was heavier.

Eboat holes absorbed damage.

British plywood could not survive.

But German doctrine was flawed.

Eboats were multi-m missission vessels.

Torpedo attacks, escort duty, mine laying, anti-ubmarine work.

This versatility meant compromises.

Eboats carried torpedoes that limited gun armorament.

Space for torpedoes reduced gun mounts.

Weight of torpedoes decreased speed slightly.

The all-purpose design was good at everything but excellent at nothing.

British specialized approach proved superior.

MGBs fought surface combat exclusively.

Every design choice optimized for gun engagement.

No torpedo tubes consuming space.

No mines occupying weight margin.

Pure firepower.

When MGB met Eboat in surface action, British boat had more guns.

Pom poms outranged German 20 mm cannons.

Earlycons matched German firepower.

Machine guns added volume.

The specialized design beat allpurpose vessel in specialized role.

Coordinated tactics amplified advantage.

MGBs plus MTBs created force multiplier.

Eboats faced impossible choice.

Engage MGBs and ignore torpedo threat from MTBs or engage MTBs and accept MGB gunfire.

German boats could not handle both threats simultaneously.

British coordination exploited this.

Forced Eboats defensive made German escorts protect themselves instead of protecting convoys.

Crew experiences were harrowing.

10 to 30 man crews on MGBs lived in constant danger.

Close quarters combat at night.

Plywood holes offered no protection.

Petrol engines meant fire risk.

High speed meant collision risk.

Mechanical failures during action left boats dead in water under enemy fire.

Navigation errors put boats on rocks.

Weather turned channel into killing zone during storms.

Loss rates reflected danger.

Multiple MGBs were lost during war to enemy action, accidents, storms, and mechanical failures leading to capture or scuttling.

Production replaced losses, but flatillas operated under strength frequently.

Some boats survived only weeks before loss.

Others completed hundreds of operations.

Luck mattered as much as skill.

Operations extended beyond combat.

MGBs rescued downed RAF airmen from channel.

Small boats could approach shore closely, pick up survivors from water or beaches, return before German forces responded.

Dozens of airmen recovered this way.

Some MGBs inserted S SOE agents into occupied France.

Night landings on isolated beaches.

Agents transferred to dingies.

Rode ashore.

MGBs withdrew before dawn.

These operations were extremely dangerous.

Discovery meant immediate engagement with coastal artillery.

German response evolved.

Eboat flatillas increased.

More escorts per convoy.

Improved radar on German boats.

Better coordination with coastal batteries.

Luftwaffer air cover during daylight.

German defensive measures forced British operations entirely nocturnal.

Daylight MGB operations became suicidal.

By 1943, British adapted.

Refined night tactics.

Improved crew training.

Added radar to later boats.

Postwar assessment validated MGB concept.

German coastal convoy system never operated safely.

Eboats focused on survival rather than offensive operations.

British MTBs achieved torpedo attack success rates that would have been impossible without MGB support.

Coastal supply to Vermach units was disrupted continuously.

German defensive resources were tied down protecting convoys.

Strategic impact exceeded tactical losses.

Motor gunboat influence extended beyond immediate war results.

Postwar navies examined coastal forces doctrine.

Fast attack craft became standard for many navies.

Gun armament emphasized over torpedoes for many designs.

British experience showed specialized vessels beat generalpurpose designs.

Soviet Navy built hundreds of gunarmed patrol boats based on MGB lessons.

Israeli Navy used similar doctrine.

Fast patrol boats with heavy guns.

Coordination between different vessel types.

The verdict was clear by 1945.

MGBs achieved mission objectives.

Eboats forced defensive.

Coastal convoys disrupted.

MTB torpedo attacks enabled.

The specialized design philosophy worked.

Gunboats fought gun battles.

Torpedo boats launched torpedoes.

Each vessel optimized for specific role.

British coordination beat German individual boat superiority.

Technical specifications proved adequate.

British powerboat MGBs matched Eboats at 40 knots.

Fair mile C and DT type sacrificed speed for heavier armament and range.

Pompom and Olicon armament outgunned German 20mimeter cannons at medium range.

Range limitations were offset by forward basing.

Plywood construction kept weight low.

Enabled armament levels despite construction materials.

Crew accommodation was minimal but adequate for short duration missions.

The design’s balanced speed, firepower, and operational radius effectively within material constraints.

Construction numbers reflected urgency.

Approximately 200 mgbs built 1941 to 1944.

Fairmile C type numbered 24 boats.

Fairmile DT type approximately 200 boats.

Many configured as MGBs.

BPB boats provided fast scouts.

Combined with MTB numbers, British coastal forces exceeded 500 boats by 1944.

This fleet dominated channel despite eboat quality advantages.

Numbers plus tactics plus specialization beat superior individual vessels.

August 1942, British motor torpedo boats withdrew under fire.

Could not fight eboats.

Could not press attacks.

Six months later, January 1943, same waters, MGBs engaged eboat screen.

Pompoms firing, olicons blazing, MTBs attacked convoy behind protection of gunboat screen.

Torpedoes hit.

German merchants sank.

British boats withdrew successfully.

The doctrine worked.

Specialized vessels for specialized missions.

MGBs proved you did not need torpedoes to win coastal warfare.

Sometimes machine guns and courage were enough.

British coastal forces beat Ebotats through tactical innovation.

The motor gun boats fought impossible odds and made victory possible.

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