TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The hydrogen transfer component is a transition metal selected from groups 5-10 of the Periodic Table (IUPAC 1990) (preferably is selected from Ni, Pd, Pt, Co, Mo and V, especially Pt). The acid component is an inorganic oxide having acid sites (preferably chlorinated alumina and protonated 10- and 12-membered zeolites, especially protonated PSH-3, beta- and MCM-22-zeolites, particularly protonated mordenite, protonated beta-zeolite or protonated ZSM-12). The hydrogenation catalyst is alumina and/or silica supported Pd, Pt, Ni, NiMo, or CoMo (preferably NiMo/Al2O3 or CoMo/Al2O3 in sulfidized form). The catalyst of the hydrocracking step (iii) contains as the molecular sieve silicoaluminophosphates (SAPO)-11, SAPO-41, ZSM-12, ZSM-22, ZSM-23, ZSM-48 or ferrierite; and as the transition metal Pt, Pd or Ni; and as a carrier Al2O3 and/or SiO2; and is selected from Pt/SAPO-11/Al2O3, Pt/SAPO-11/SiO2, Pt/ZSM-12/Al2O3, Pt/ZSM-22/Al2O3 and Pt/ZSM-23/Al2O3 and Pt/ZSM-48/Al2O3.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The deoxygenating step (ii) is carried out by hydrolyzing, decarbonylating, decarboxylating, and/or treating with hydrogen, i.e. hydrodeoxygenating, the natural fat or its derivative. The hydrodeoxygenating step (ii) is carried out by feeding hydrogen and the natural fat or its derivative through a catalyst bed, at 100-450 (preferably 250-350, especially 280-345) degrees C, and preferably at a pressure of 1-20 (preferably 3-10, especially 4-8) MPa. The hydrodeoxygenating step (ii) is carried out in the presence of a hydrogenation catalyst which contains a metal selected from any one of Groups 6 to 10 of the Periodic Table (IUPAC 1990) supported on alumina and/or silica. The hydrocracking step (iii) is carried out by feeding the aliphatic 9-28C hydrocarbon originating from step (ii) in liquid form together with hydrogen gas through a reactor having hydrocracking conditions and a hydrocracking catalyst. In the hydrocracking step (iii), the feeding rate liquid hourly space velocity (LHSV) of the aliphatic 9-28C hydrocarbon is 0.1-10 (preferably 0.1-5, especially 0.2-3) 1/hour, and the volume ratio of the hydrogen and the volume ratio of hydrogen to the aliphatic 9-28C hydrocarbon in the feed is 10-2000 (preferably 100-1500, especially 300-1500) m3/m3 (NTP). In the hydrocracking step (iii), the temperature is maintained at 100-700 (preferably 200-500, especially 280-400) degrees C, and the pressure is maintained at 1-20 (preferably 1-15, especially 1-10) MPa. The hydrocracking catalyst of the hydrocracking step (iii) contains a molecular sieve providing acidic function, and a transition metal selected from any one of Groups 8-10 of the Periodic Table (IUPAC 1990) providing metallic function, where the amount of the molecular sieve is 20-80 wt.%, and the amount of transition metal is 0.1-30 wt.% of the hydrocracking catalyst. The 2-14C hydrocarbon isomerization step (iv) is carried out at 100-500 (preferably 150-400, especially 200-300) degrees C, and a pressure of 1-20 (preferably 2-15, especially 2-10) MPa; and is carried out in the presence of a catalyst based on a hydrogen transfer component and an acid component. In the method, at least part of the aliphatic 9-28C hydrocarbon formed in the deoxygenating step (ii) is isomerized in a 9-28C hydrocarbon isomerization step (ii') to give an isomerized aliphatic 9-28C hydrocarbon, at least part of which is recovered as heavy fuel and/or in step (iii) hydrocracked into an aliphatic 2-14C hydrocarbon. The aliphatic 9-28C hydrocarbon obtained in the deoxygenating step (ii) or the 9-28C isomerization step (ii'), is at least partly hydrocracked in step (iii) into an aliphatic 2-8C hydrocarbon, the rest that remains from steps (ii) or (ii') is separated and recovered as heavier (9-28C) fuel or its raw material, or alternatively, fed back to the hydrocracking step (iii). Preferred Components: The natural fat provided in the step (i), is selected from triglycerides of 10-28C fatty acids. The natural fat derivative is selected from mono- and di-glycerides of 10-28C fatty acids, 10-28C fatty acids, 10-28C fatty acid anhydrides, non-glyceride 10-28C fatty acid esters, 10-28C fatty alcohols, and corresponding compounds with and without hydrocarbyl substitution, branching or unsaturation. EXAMPLE - No suitable example given.