Patreon 23: Coal, Canals, Convoys & Coastal Carrying: traffic around the British isles from 1939-45

They can be physically and intellectually demanding because researchers must spend long periods deciphering difficult handwriting in archival volumes.

Britain's home-water commands and coastal convoys connected ocean arrivals to ports around the country when roads and railways could not absorb the whole burden.

Not on the First World War scale: the fleet was overwhelmingly oil-fired, although some coal-burning ships remained and coal still moved extensively by rail and sea.

It was at least as important, and perhaps more so, because ships distributed imports among ports that neither the railways nor the limited road-haulage system could handle alone.

Not to the same extent as after the war; larger postwar loads exposed constraints created especially by bridges and built-up infrastructure around the canals.

The dense list of BB, BC, BD, BK, BTC, and other route codes reveals a scheduled network linking British ports, Irish traffic, and ocean-bound convoys.

Loss figures show that coastal waters could be deadlier than the North Atlantic early in the war, despite the campaign's low profile in popular memory.

They disrupted and reshaped traffic, but Britain had no adequate substitute, so convoys continued under minesweeping protection.

Not by speed alone; coastal convoys remained exposed to submarines, mines, Luftwaffe aircraft, and E-boats throughout the campaign.

A convoy generally moved at the speed of its slowest ship, while age, loading, maintenance, and weather made a single reliable average misleading.

Britain entered the war with large stocks built up from prewar planning, enough that fuel could be reserved for flame defenses on threatened beaches as well as normal military use.

Yes; traffic serving Cardiff, Newport, and other Bristol Channel ports was within the coastal campaign's reach.

Submarine basing and some ship construction would probably move south, increasing the importance of Devonport, Portsmouth, Southampton, Cammell Laird, and possibly Belfast.

U-boats, E-boats, aircraft, mines, shore guns, weather, and widely different merchant ships made coastal escort work unusually demanding.

Sealing merchant radios protected a convoy's position but left its few escorts responsible for every radio warning and instruction.

Retired naval officers and experienced merchant captains served as convoy commodores, enforcing course, speed, and instructions from a merchant flagship.

Traffic was heavy around the whole coast, with especially intense flows on the east and south coasts and from the west coast toward London.

Air cover was intended, but early-war shortages and the limited endurance of Hurricanes and Spitfires made continuous protection difficult until longer-ranged aircraft became more available.

It was very busy, handling local and passing traffic as part of a system that used every viable port.

Usually the ocean-going ship entered a major defended port and then joined coastal convoys to reach the port nearest its cargo's destination.

Not in useful numbers that early; some convoy cover instead fell to aircraft such as the Swordfish because it could remain airborne for long periods.

Britain's marked and swept coastal routes had to be deep and wide enough for shipping while remaining shallow enough to restrict submarine attacks.

They could have raised early U-boat losses, disproportionately removing Germany's scarce prewar-trained crews and improving convoy survival later in the war.

The Colossus and Majestic light fleet carriers show a strong design resemblance to Unicorn, with modifications for their different role.

HMS Queen Elizabeth's hangar shows why a larger air group requires more support shipping as well as more parking space.

Clusters and lines of Second World War wrecks make the convoy lanes and their assembly points visible along Britain's east coast.

Southampton's King George V dock was large enough in principle, although its gates had been removed and it would require recommissioning.

Armed trawlers, patrol craft, gunboats, and small purpose-built classes supplied the numbers needed to protect Britain's many simultaneous coastal convoys.

The terms overlap and depend heavily on the writer's perspective: an operation may include a raid or battle, while the same event can be classified differently in different accounts.

It was principally a legal classification: an aft-mounted gun was treated as defensive, whereas a forward-mounted gun could make the ship appear offensively armed.

It was used intensively rather than substantially enlarged, building on a network that already carried significant traffic before the war.

Typically a lieutenant, often from the Royal Naval Volunteer Reserve; some civilian trawler skippers received wartime commissions and retained command of their vessels.

Ventilation experiments began in the interwar decades, limited air-conditioning installations appeared from about the 1960s, and adoption widened after the First Gulf War.

Sometimes; disguised armed vessels could accompany coastal traffic as part of its protection.

Britain's inland waterways moved roughly 12 million tons of essential goods a year while saving petrol, rubber, road capacity, and coastal shipping space.

Women crews moved steel and coal along inland waterways after brief training, while the canals themselves became defended transport arteries and anti-invasion lines.

German mines aimed at rivers and canals sometimes landed in streets, houses, or factories, requiring naval specialists to work alongside Army and RAF disposal teams.

British defense planners incorporated canals into layered stop lines because their known depth, banks, and crossings created predictable obstacles to an invader.

The task was difficult, but more escorts were assigned and the Channel approaches were heavily barred while German attention shifted toward cross-Channel traffic.

It was the center of a northern defensive line and an inland redoubt whose loss would open a dangerous route deeper into Britain.

Japan used many small craft, but American pilots still attacked them, and aircrew claims often exaggerated the size and destruction of their targets.

They diminished after Germany invaded the Soviet Union in 1941 and had committed the forces needed for a cross-Channel invasion elsewhere, with the shift clear by about 1942.

Some canal craft carried weapons and were operated by Army organizations such as the Royal Engineers rather than the Royal Navy.

Yes; vessels carried anti-aircraft guns, and larger offshore forts also protected approaches such as the Thames against aircraft and surface threats.

Some airfields near canals received ammunition and other heavy supplies by water, reducing the burden and risk of moving bulky cargo by road.

The women marked IW for Inland Waterways endured an unfair nickname while performing hard, mobile work that linked factories and cities across Britain.

Generally local crews operated their own waterways, while canals were too slow and geographically fixed to keep pace with rapidly advancing field forces.

Britain's canal stop lines formed only one layer of defense; capital ships, cruisers, and destroyers were also positioned to attack a German invasion fleet.

A largely separate shipping pool handled the immediate supply effort, although larger merchant ships could enter once captured ports were cleared and restored.

Norway could have mobilized in defense of neutrality and forced German landing groups to confront manned forts and organized troops.

No total is given; casualties appear limited, although crews faced strafing, mines, and other attacks and some women were killed.

It could have shortened the war by denying German bases and Norwegian resources, constraining U-boats, and making the Arctic supply route to the Soviet Union much easier to protect.

Germany lacked the lift and support to hold it; a small force delivered by major warships would face a larger British counter-invasion and expose its supporting ships.

Britain used naval and other service personnel in the Defensively Equipped Merchant Ships organization, commonly abbreviated DEMS.

Sweden would probably lean toward the Allies, while Finland might remain neutral rather than renew war with the Soviet Union alongside Germany.

No direct relationship is identified; Novik and her class are still described as interesting, well-designed destroyers.

Yes, but the campaign was conducted half-heartedly and hampered by a poor command structure.