Last month, the Japanese ships of the first and second ranks, which had just been launched, had arrived at their designated positions in order to cooperate with Iida's attack. This is the most advanced personnel landing ship of the Japanese army, and according to Makino's suggestion, the production priority has been raised. Before the advent of these ships, Japanese personnel had to be transferred to sampans for landing, but now they can land directly at the booth head, which greatly improves efficiency. The ships were transferred to Rabaul, and on the way the captain opened the envelope from Nagasaki to obtain a new route, and all the ships turned to Singapore without radio command, taking full advantage of the geographical and hydroacoustic occlusion effects of the South Asian Fragment to evade possible surface and underwater reconnaissance. Here in Iida, the time has already appeared, just wait for Itagaki here, and use the final blow of the nuclear bomb, whether it can destroy the headquarters of Chu Tingchang or not, in short, it can cause chaos.

Itagaki had been waiting for news of the reorganized Southern Agency, and since he and Kagesa Zhenaki had revised the communication rules to make it easier to leak secrets, waiting for the news had become the most painful thing. The team that went out to track down the location of Chu Tingchang's headquarters had to return far before they could use the army's telephone line to make contact, and the intelligence might have been invalid.

Of course, there are still many surprises after the rebuilding of the South African Organs. The biggest gain is to buy some Lao armed forces. After Chu Tingchang beat Wang Bao's bandit forces in Cambodia, this neutral boy scout gradually fell to Japan. Chu Tingchang became an enemy in the heart of this bandit army. Chu Tingchang didn't take them very seriously, and never lured them in, but just sent his own picket troops to constantly beat them in the rear of Thai-Cambodian Liao, trying to completely eliminate them. However, relying on the advantages of locals and minors, these people easily infiltrated the vicinity of Chu Tingchang's headquarters, and gradually shifted from armed struggle to assassination of soldiers and intelligence gathering. They are a huge scourge that Chu Tingchang has not yet realized.

Judging from the intelligence of Britain and the United States, it will take time for the Japanese army to lighten nuclear weapons and use air platforms, of course, the intelligence sources of Britain and the United States are unknown, and many of them may be analyzed (fabricated) at home by intelligence personnel in order to be perfunctory, which is actually a common problem in the intelligence community.

In his personal judgment, he himself could not do it by dropping nuclear bombs by bombers, first of all, there was a lack of bombers with a sufficient bomb load. The land-based bombers of the Japanese Navy and Army were mainly double, and the navy's seaplanes were four-shot, but the load was even worse, and if the Japanese barely carried the bombs with underloaded aircraft, then they would certainly not be able to fly far.

Secondly, the Japanese navigation at night is the same thing, even if they know the location of the headquarters in advance, they may not be able to find it (he predicts that if they sneak attack their own headquarters, it can only be at night). He himself sent reports from time to time to remind Zhou Youfu and Tao Mingzhang to beware of the enemy's nuclear bomb sneak attack, but the transfer of his command headquarters was not very active, and he felt that it was not possible for the Japanese to go deep into the deep area and attack his headquarters.

Chu Tingchang's judgment is indeed reasonable, but the only variable comes from Makino, from the recent period of time, Makino's sorting out of the Kasugamaru salvage.

While studying the submersible scout that 419 lost in Kasuga Maru, Makino found some interesting parts that inspired him a lot.

The navigation of this little thing is divided into three parts, of course, the first is optical fiber command navigation, which is based on the position tracking of the submarine to the reconnaissance, and the second is inertial navigation. But there is another part of the system for acoustic navigation, and this is the first time Makino has known about the existence of this part.

He himself studied *navigation, so suddenly there was a flash of inspiration. Obviously, the submarine has to be very careful with the use of sound underwater, because it is easy to expose itself, so between the submersible and the submarine. Only very directive, very narrow beams can be used.

This idea has been in place since then, but it has not been very practical, and Japan has also obtained from Germany the so-called "Knickersbein" night bombing system, which can achieve good theoretical navigation accuracy and even indicate targets. However, because the correction beam is too narrow, the aircraft often does not receive the narrow beam correction signal due to a slight yaw. On the contrary, it has no practical effect. 、

At present, the Japanese bombing in Vietnam can only secretly measure the signal of the Allied navigation station, but because there is no distance data, the error is very large, and the Allied aircraft can use the radio question and answer with the navigation station to know the precise position and the distance relationship with the target (thanks to Chu Tingchang's networking plan, so that the information can be shared).

The navigation of the deep submersible is actually a pulse correction system, which does not send signals all the time, but only at a fixed time, in a fixed direction, and sends a short signal to correct the target. Once the submersible does not receive the signal at the agreed time, it means that it is yawed. Of course, it is only a backup system, and usually submarines may not dare to use it.

Based on this line of thinking, he put forward the proposal of using the latest Japanese electronic devices to carry out narrow beam signals and precise navigation. He suggested that the aircraft should be on a strictly straight course, using a series of temporary navigation devices built in North Vietnam, constantly emitting correction signals. These signals are measured by a circular sideways antenna, which is measured by the Traveling Beambias Measurement method, and is no longer expressed by the rough audio of the abrupt or slow sound, but is displayed directly on the meter, providing the amount of correction.

Of course, from a tactical point of view, the problem with this use of narrow beam navigation is that the pilot has little flexibility to change the course, and once he changes the course and corrects it back, he may miss the correction point. It is currently unknown whether the nuclear bomb platform modified with the captured B17 has the ability to return home with bombs. The Army's technical department assessed that there was a high probability that it would be feasible, that is, that there was a certain probability that it would not be feasible. As for forcibly landing with a bomb, will it explode at the airport? The Army's assessment is that there is not much chance, but it cannot be said that there is no possibility at all.

Chief Chu's headquarters is almost nowhere to be found. The radio communication volume of his command headquarters is only at the level of ordinary division headquarters, and in this regard, he and Zhou Youfu are very good at calculating. There are more than a dozen divisions (brigades) operating in the entire Indochina Peninsula, which is obviously enough for the Japanese intelligence agencies to be confused for a while. However, his command headquarters relied too much on telephone lines, and sometimes in order to expedite the laying of telephone lines, some horses would leak out, the most obvious part was that usually the telephone lines of the division headquarters would simply be hung on trees, or with very few wooden poles, while Chu Tingchang's headquarters had special wire units and cable maintenance not to be lost, and used special line trucks and engineers of the US military to bury cable troops, and there were trucks with telephone poles behind the troops to follow closely.

Most of Wang Bao's troops were illiterate, but the Japanese taught them some basic skills, and it was enough to smell some clues.

The guerrillas were divided into hundreds of groups and scattered everywhere, and a large number of suspicious characters had recently appeared around each unit at the division or brigade level. In the past 10 days alone, Chu Tingchang's picket troops have shot or hanged 400 suspicious elements in the entire war zone, some of them have weapons and binoculars, some have recorded the number of the unit in their notebooks, and some of them have not found anything, but they look like thieves and rats.

Among these groups, it is inevitable that some will touch the edge of Chu Tingchang's headquarters. Chief Chu's headquarters is currently at the junction of Laos and Thailand, but it is not far from the front line. Soon the guerrillas discovered that the number of field kitchens in this headquarters was greater than that of ordinary division-level headquarters, and the procurement of materials was also frequent. Of course, this does not constitute a judgment element. However, the Japanese agent Kusumoto still relied on intuition to sense some problems, and then Kusumoto himself came to the vicinity of Chu Tingchang's headquarters, followed the personnel who went out to procure, and found that the man in charge of procurement in the unit was wearing the rank of lieutenant. And I didn't go to any agricultural products market in a jeep, but went directly to a few restaurants opened by French people to purchase semi-finished products, and the harvest quantity was not large, and there was basically no bargaining.

From there, he began to focus on this headquarters, although the headquarters of Chu Tingchang was subsequently transferred, but Nan Ben proudly tracked the extended telephone pole to track down the headquarters again. He could now be sure that the decision of this command was not simple, the surrounding alert troops were very mixed, there were 200 divisions and quasi-gendarmerie troops transferred from Tao Mingzhang's department, the cordon circle was 4 kilometers away, and the average survival time of the members of the team he sent out to spy was only about two days. Usually a kid sent in close proximity to reconnoitre, and the next day he would find the hanging corpse in the tree near the barracks. If there is too much spying, Chu Tingchang's headquarters will be transferred, but Kusumoto can still find a new position.

He sent the news to the rear through complex intelligence transmission channels, and Chu Tingchang's command seemed to have eyebrows, and it also created a huge problem for the special attack team on Hainan Island, and at present, the vehicles and nuclear bombs have not yet reached the mature stage. Is it a risk to blitz.

No one dares to make a decision on this matter, after all, once the night navigation fails, and the plane cannot casually throw away such a precious war resource, what should be done? In fact, the B17's magazine could not adapt to the geometry of the nuclear bomb, and the magazine had to be opened all the way, and the range was not guaranteed (after several test flights with counterweight simulators, but each time the transition range obtained was different and the error was huge).

Itagaki knew that everyone had hidden in the aftermath, and it was time for them to make their own decisions. The fleet is gathering near Singapore, and if it drags on, the intentions will be exposed. He carefully inquired about the feasibility of the new navigation plan, and felt that he was three or four percent sure that he could give it a try. In the plan, the B17 aircraft will still use the American insignia as a means of disorienting the enemy's aircraft, and the aircraft will take off before the early hours of the morning to try to carry out the attack at dawn, and once the navigation plan fails, use the light of dawn to visually search for the headquarters of Chu Tingchang, and then carry out suicide attacks. If the visual search fails, the aircraft returns home.