I too dont think it would work. The Germans would have required more Landing craft and good ones. Here are the Landing craft they did have and when they were made. The first type MFP would have been good eneogh for the job however it did not enter service fast eneogh.
Marinefährprahm
Type A
Dimensions
Size (Max): 200 t
Length (Total): 47,04 m
Beam: 6,53 m
Draft: 1,45 m
Payload: 105 t
Crew: 17
Weapons
7,5 cm: 1
2 cm MG: 1 (3 in the Med. and Black Sea)
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 390 shp
Speed: 10,5 kn
Range: 1075 miles at 7,5 kn
Type B
Dimensions
Size (Max): 220t
Length (Total): 47,04 m
Beam: 6,53 m
Draft: 1,45 m
Payload: 105 t
Crew: 17
Weapons
7,5 cm: 1
2 cm MG: 1 (3 in the Med. and Black Sea)
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 390 shp
Speed: 10,5 kn
Range: 1075 miles at 7,5 kn
Type C
Dimensions
Size (Max): 220t
Length (Total): 47,04 m
Beam: 6,53 m
Draft: 1,45 m
Payload: 105 t
Crew: 17
Weapons
7,5 cm: 1
2 cm MG: 1 (3 in the Med. and Black Sea)
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 390 shp
Speed: 10,5 kn
Range: 1075 miles at 7,5 kn
Type D
Dimensions
Size (Max): 239 t
Length (Total): 49,82 m
Beam: 6,59 m
Draft: 1,35 m
Payload: 140 t
Crew: 21
Weapons
8,8 cm: 1
2 cm MG: 2
8,6 cm RAG: 2
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 371 shp
Speed: 10,3 kn
Range: 1066 miles at 7,3 kn
Marine Nachschub Leichter
Dimensions
Size (Max): 216 t
Length (Total): 38 m
Beam: 5 m
Draft: 1,3 m
Payload: 90 t
Crew: 9-14
Weapons
3,7 cm: 1
2 cm MG: 4
Engines
Shafts: 2
Engines: 2
Type: truck diesel
Performance
Total Performance: 250 shp
Speed: 10 kn
Range: 560 miles at 10 kn
Marine Artillerie Leichter
Dimensions
Size (Max):
Length (Total): 34,60 m
Length (Waterline):
Beam: 8,60 m
Draft:
Crew:
Weapons
8,8 cm: 2
2 cm MG: 8
Engines
Shafts:
:
Type:
Performance
Total Performance:
Speed:
Range:
Artilleriefährprahm
Type A
Dimensions
Size (Max): 300 t
Length (Total): 47,04 m
Length (Waterline):
Beam: 6,55 m
Draft: 1,7 m
Crew: 48
Weapons
8,8 cm: 2
3,7 cm MG: 1
2 cm MG: 8
Engines
Shafts: 3
Engines: 3
Type: Truck diesel
Performance
Total Performance: 387 shp
Speed: 10,2 kn
Range: 412 miles at 8,7 kn
Type D
Dimensions
Size (Max): 255-381 t
Length (Total): 49,80m
Length (Waterline):
Beam: 6,61 m
Draft: 1,3-1,4 m
Crew: 57-65
Weapons
10,5 cm: 2 (or 8,8 cm)
2 cm MG: 8
15mm MG: 1
Engines
Shafts: 3
Engines: 3
Type: Truck diesel
Performance
Total Performance: 368 shp
Speed: 8 kn
Range: 1075 miles at 8 kn
Siebel Fähre
Transport Hydrofoil VS 8
Dimensions
Size (Max):
Length (Total): 31,90 m
Length (Waterline):
Beam: 10,26 m
Draft: 2-4,25 m
Crew: 22
Weapons
15 mm MG: 4
Engines
Shafts: 2
Engines: 2
Type: Daimler Benz 20cyl MB 501 diesel
Performance
Total Performance: 3660 shp
Speed: 45 kn
Range: 200 miles at 45 kn
So as you can see only 2 landing craft existed for Operation Sealion and only one was avialable. They needed more and better designs.
Marinefährprahm
The Naval Landing Crafts - called "Marinefährprahm" in German were the largest landing craft used by the Kriegsmarine. Although required for Operation Sealion (Invasion of England) in 1940, the first of this transport ships were delivered in 1941. The development of this ship went through several Types (A-D), whose size and armament grew from class to class.
They were mainly used for transport and supply duties and not for their initial invasion role and could transport 200 Soldiers or 140ts of equipment, including Tiger tanks.
Marinefährprahme were used in almost all Kriegsmarine operational areas, the British Channel, the Mediterranean and the Black Sea.
http://www.german-navy.de/kriegsmarine/ships/landingcrafts/mfp/index.html
Type A
Dimensions
Size (Max): 200 t
Length (Total): 47,04 m
Beam: 6,53 m
Draft: 1,45 m
Payload: 105 t
Crew: 17
Weapons
7,5 cm: 1
2 cm MG: 1 (3 in the Med. and Black Sea)
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 390 shp
Speed: 10,5 kn
Range: 1075 miles at 7,5 kn
Type B
Dimensions
Size (Max): 220t
Length (Total): 47,04 m
Beam: 6,53 m
Draft: 1,45 m
Payload: 105 t
Crew: 17
Weapons
7,5 cm: 1
2 cm MG: 1 (3 in the Med. and Black Sea)
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 390 shp
Speed: 10,5 kn
Range: 1075 miles at 7,5 kn
Type C
Dimensions
Size (Max): 220t
Length (Total): 47,04 m
Beam: 6,53 m
Draft: 1,45 m
Payload: 105 t
Crew: 17
Weapons
7,5 cm: 1
2 cm MG: 1 (3 in the Med. and Black Sea)
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 390 shp
Speed: 10,5 kn
Range: 1075 miles at 7,5 kn
Type D
Dimensions
Size (Max): 239 t
Length (Total): 49,82 m
Beam: 6,59 m
Draft: 1,35 m
Payload: 140 t
Crew: 21
Weapons
8,8 cm: 1
2 cm MG: 2
8,6 cm RAG: 2
Engines
Shafts: 3
Engines: 3
Type: truck diesel
Performance
Total Performance: 371 shp
Speed: 10,3 kn
Range: 1066 miles at 7,3 kn
Marine Nachschub Leichter
While the bigger Marinefährprahm was originally designed to transport heavy equipment like tanks over the British Channel, the smaller Naval Supply Lighter (Marine Nachschub Leichter - MNL) were constructed to the use in rivers, limiting their size.
Designed in 1943/44, their dimensions were to fit the rivers and channels in the southern part of France, since it was also planned to transfer them to the Mediterranean via those waterways and use those crafts there. But when they got operational, the Allied landings in Normandy and Italy prevented to do so and they operated at the German coastline and rivers
http://www.german-navy.de/kriegsmarine/ships/landingcrafts/mnl/index.html
Dimensions
Size (Max): 216 t
Length (Total): 38 m
Beam: 5 m
Draft: 1,3 m
Payload: 90 t
Crew: 9-14
Weapons
3,7 cm: 1
2 cm MG: 4
Engines
Shafts: 2
Engines: 2
Type: truck diesel
Performance
Total Performance: 250 shp
Speed: 10 kn
Range: 560 miles at 10 kn
Marine Artillerie Leichter
With a length of nearly 35 meters, the Marine Artillerie Leichter (MAL) were the smallest landing craft in Kriegsmarine services. Designed after the requirements of the German Army, those small vehicles should be used during Operation Barbarossa, the attack on the Soviet Union. Their projected operational area was the Caspian Sea where the MAL should be used to attack Soviet oil transports from Baku to Astrakhan. Therefore the MAL must have been able to be transported by land which was impossible with the bigger MNL or AFPs.
With the progress of the war, the Marine Nachschub Leichter operated in other areas like the Black Sea or the Mediterranean.
http://www.german-navy.de/kriegsmarine/ships/landingcrafts/nal/index.html
Dimensions
Size (Max):
Length (Total): 34,60 m
Length (Waterline):
Beam: 8,60 m
Draft:
Crew:
Weapons
8,8 cm: 2
2 cm MG: 8
Engines
Shafts:
:
Type:
Performance
Total Performance:
Speed:
Range:
Artilleriefährprahm
Based on the Marinefährprahm Type D, those Artillery Ferries were used for several different kind of operations. Although being first though as a provisional design, they took over the role of gunboats in various operational areas, including the British Channel, Mediterranean and the Black Sea.
Besides their use as escort vessels, they were also occasionally used for shore bombardments and mine laying, they proved to be very usable crafts.
The ferries had a light armor protection, 20 mm armor steel and up to 100 mm concrete armor at the superstructures and ammunition stores.
http://www.german-navy.de/kriegsmarine/ships/landingcrafts/afp/index.html
Type A
Dimensions
Size (Max): 300 t
Length (Total): 47,04 m
Length (Waterline):
Beam: 6,55 m
Draft: 1,7 m
Crew: 48
Weapons
8,8 cm: 2
3,7 cm MG: 1
2 cm MG: 8
Engines
Shafts: 3
Engines: 3
Type: Truck diesel
Performance
Total Performance: 387 shp
Speed: 10,2 kn
Range: 412 miles at 8,7 kn
Type D
Dimensions
Size (Max): 255-381 t
Length (Total): 49,80m
Length (Waterline):
Beam: 6,61 m
Draft: 1,3-1,4 m
Crew: 57-65
Weapons
10,5 cm: 2 (or 8,8 cm)
2 cm MG: 8
15mm MG: 1
Engines
Shafts: 3
Engines: 3
Type: Truck diesel
Performance
Total Performance: 368 shp
Speed: 8 kn
Range: 1075 miles at 8 kn
Siebel Fähre
During the preparation for Operation Seelöwe - the invasion of England - it soon got clear, that the Kriegsmarine needed a high number of landing crafts. Therefore all branches of the German Army made proposals for such a craft - the Luftwaffe proposal was is known as the Siebel-Fähre (Siebel Ferry) named after its inventor, Oberst Siebel.
The Siebel-Ferries were constructed from existing material, pioneer pontoon originally used ot build auxiliary pontoon bridges. Two of those pontoons were connected side-by-side, a propulsion unit with BMW aircraft engines was added in the back and a large platform mounted on top of the pontoons was used to carry the payload. Vehicles could enter or leave the craft over a ramp on the bow of the ferry.
There were multiple version of those crafts build, from transport crafts over artillery ferries to staff command ships or hospital ferries. The drawing shows one version of a transport ferry.
http://www.german-navy.de/kriegsmarine/ships/landingcrafts/siebel/index.html
Transport Hydrofoil VS 8
Germany experimented with various hydrofoil designs since the late 1938, most of them being design studies for fast attack craft. One remarkable exception was the Fast Hydrofoil Transport VS8 and its sister ship, the VS9 .
Being able to transport one small or medium tank, (Type 38T or IV) which was stored on a special designed pontoon in the back of the ship, the VS8 was build as a prototype for experimenting with this kind of transport method. To load or unload the tank, the bay in the back of the ship was flooded and the pontoon, equipped with two 40 hp engines, could be removed or loaded on the ship. Experiments showed that loading the pontoon took less then two minutes, unloading less than one.
Besides its task as a fast transport, it was also discussed to use the ship as a fast mine layer, capable of laying 15-20 mines.
The VS8 was ordered in 1940 and commissioned on 01.03.1943. It got soon clear that the engines were not powerful enough to let the ship operate in moderate seas, it also was not able to archive its projected top speed. On September 1944 the ship beached after a total engine failure and broke into two pieces during rescue operations.
A second prototype, the VS9 , was ordered in 1941, but construction never started.
http://www.german-navy.de/kriegsmarine/ships/landingcrafts/vs8/index.html
Dimensions
Size (Max):
Length (Total): 31,90 m
Length (Waterline):
Beam: 10,26 m
Draft: 2-4,25 m
Crew: 22
Weapons
15 mm MG: 4
Engines
Shafts: 2
Engines: 2
Type: Daimler Benz 20cyl MB 501 diesel
Performance
Total Performance: 3660 shp
Speed: 45 kn
Range: 200 miles at 45 kn
So as you can see only 2 landing craft existed for Operation Sealion and only one was avialable. They needed more and better designs.