Does marcos have more SBS influence or SEAL?
A little bit of both.....MARCOS were raised out of the CD (Clearance Divers)
SBS set up the Diving School in India back in the late 1950s. This is written in Wikipedia but I went through the references it gave and it is from an encylopedia of world special forces co-authored by Chris Ryan who was in the 22 SAS, so I belive it to be true, since it comes directly from a UKSF vetran. Do check that out.
In 1971 they were involved in covert sabotage ops in Bangladesh similar to how SBS did in WW2 but more similar to how OSS or SOE operates because they trained Mukti Bahini too and were good at tradecraft. Read Operation X for more.
In mid-late 1970s again India learnt how to extract oil from the ocean near Bombay High and so the oil facilities were formed. In Duncan Falconer's book "First into Action" the British SBS says that in the late 1970s, SBS was the first unit to come up with the Idea that Oil Rigs need protection from potential sabootage and terror attacks and thus trained for it.
According to Indian Navy, MARCOS as IMSF were raised exactly to protect offshore oil rigs, something that was sanctioned in 1985-86 and was fully functional force by 1987. In between various forces were studied, they went throught training with SEALs is when we first hear of their interaction with them
The force has come a long way after that and we can say that though their mandate is similar to SBS, their training pattern is similar to SEALs structure wise. But ragda wise the diving school's still the same, the land part is inspired from BUD/S and the final phase is more like UKSF continuation trianing.
MARCOS are often compared with SEALs because they are more famous. Also Royal Marine's SBS are very small - fewer than 200 guys handling missions around the world. Where would they have time to cross train with other countries too often, so we train with them too but we train with their Royal Marines as well. We mostly see us training with SEALs - be it Vanila ones, because they are larger.
So apke upar hai dekhlo whose influence we follow the most.