I know from reviewing readership stats that KP readers are not as much interested in international relations as they are in NZ domestic and foreign policy and various social issues. There is some interest in what Donald Trump is doing to the world from his throne in the Oval Office, so I figured I would scratch that itch and write a brief about yet another moronic move that he has recently made.
After being trolled on Telegraph by former Russian president and current Russian National Security Council Deputy Chair Dimitry Medvedev, Trump posted on his Truth Social media account that he had ordered two nuclear submarines “closer to Russia” in “the (appropriate) regions.” He repeated this on the conservative Newsmax television channel a few hours later, claiming that what Medvedev said was a threat that needed a strong response. However, given the realities, I doubt that Medvedev or Putin are quaking in their boots. Let me break down why they are not.
To begin with, Trump is presumably talking about nuclear armed submarines like the Ohio-class “boomers” that carry sea launched ballistic missiles (SLBMs). The US has plenty of nuclear powered attack submarines (SSNs) like the Virginia class boats that are the basis of the AUKUS development project with Australia and Great Britain, but these do not carry SLBMs and would not provide any deterrent effect on Russia or another hostile nuclear-armed State. If the message is not meant as a strategic deterrent and SSN;s are being sent, then their strike value is limited and tactical.. Given that Trump’s complaints about Russia are about a strategic ceasefire in Ukraine, a tactical response is unlikely to move the Russians into compliance and will just escalate the situation beyond Ukrainian borders.
So Trump is likely referring to the Ohio class boats, which carry Trident II D5 SLBMs that have ranges of 4100-7600/11,500-14,000+ nautical miles/kilometers and travel at supersonic speeds ranging upwards from MACH 19 (20,000 feet per second or 18,000 mph/29,000 kph). The carry 8-14 multiple independently targeted re-entry vehicles (MIRVs) with warheads that have “throw-weights” of 100 to 435 kilotons (the latter deigned to hit “hardened” targets like missile silos, command bunkers and deep tunnel complexes. In comparison, the “Little Boy” bomb that destroyed Hiroshima was 15 kilotons). They tend to lurk in off shore deep waters, often in undersea canyons, waiting for the order to strike. Given their ranges and speeds, there is no need for SLBM platforms like the Ohio class boats to “get closer” to targets. In fact, to do so is folly.
Why? When the order comes, these submarines must rise from deep water (they are said to be able to dive as deep as 1,500 feet or more) to relatively shallow depths of 150-200 feet. That is because the underwater propulsion stage of the SLBM, which uses a sophisticated variant of steam-based propulsion, does not have the energy or pushing power to reach the surface from greater depths. Once the surface is reached, a solid gas propellant is ignited, accelerating the missile to supersonic speed before MIRV re-entry.
This is where Trump’s bluff is called. Ordering US SBMs “closer to Russia” negates the advantages of deep water concealment because it brings the submarines over shallower coastal shelves or seas (say, the Baltic or Black Seas). That makes it easier for Russian anti-submarine warfare (ASW) platforms (including attack submarines of their own) to hunt, locate and track them. In addition to sonar and radar as well as satellite imagery, modern hydrophone detection systems and seafloor thermal and acoustic mapping arrays are used to seek out and record the acoustic signatures of submarines (which can be as distinctive as finger prints), something that is easier in more shallow and warmer waters given sea layer temperature variations produced by water density, depth pressure, refraction, salinity, thermoclines, etc., including the waters of narrows, straits and other maritime chokepoints. Even deep water can conduct and bend sound over long distances, such as in the low frequency SOFAR channel that extends from 600-1200 meters down in low to middle latitudes to near the surface at higher latitudes (which is one way of listening to whale calls with hydrophones). All of which is to say that the frequency, wavelength, bend and amplitude of underwater sounds are related to water temperature and depth, so have become important markers for underwater scientists and engineers, including those in the submarine/ASW businesses.
Phrased another way that Trump might understand: cold and deep water good for submarines; warm and shallow, bad. Trump clearly has not gotten this brief. Or perhaps his version came from the same advisors who told him that a tariff is a non-transferable tax paid by foreign exporters to the US.
In that light ordering US SLBM submarines into shallower and possibly warmer waters near Russian coasts as a show of force and then giving the precise number of those being told to so is a breach of basic submarine operational security. It allows the opportunity the Russians the opportunity to refine their ASW skills and perhaps even get a better idea of how the two particular submarines in question look and sound like underwater. In other words, besides the childish nature of the tit-for-tat spat with Medvedev, Trump has been suckered into blurting out, yet again, potentially sensitive information about US naval capabilities and operations.
The US Navy has choices to make. It can do nothing and try to pretend that it followed his orders, hoping that his minions in the Navy and Pentagon are kept out of the submariner information loop. It could order the ships to drive around in circles and claim that it followed orders. It can object to the commander-in-chief’s order and try to convince him to rescind it at the risk of having careers ended (if he in fact issued one). Or they can salute and follow commands as they are instructed to do even if it puts crews and contingency plans at risk. None of this was necessary given current US submarine operational protocols and capabilities, so this was not a believable warning much less a credible threat. It was theatrical bluster without merit.
But then again Trump is a mixture of ignorance, impulse, thin-skinned ego, bully and pomposity, so his meaningless showman’s gesture will remind Medvedev, Putin and many otherwise US-allied leaders yet again that there is a petulant knucklehead sitting in the Oval Office as POTUS.
MAGA!